Permit No. MAS010001 Page 1 of 20

AUTHORIZATION TO DISCHARGE UNER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM

In compliance with the provisions of the federal Clean Water Act, as amended, 33 U. C. 1251 et seq ., and the Massachusetts Clean Waters Act, as amended, Mass. Gen. Laws. ch. 21, 26­ the Boston Water and Sewer Commission

is authorized to discharge from all of its new or existing separate storm sewers: 195 identified Separate Stor. Sewer Outfalls and associated receiving waters are Listed in

Attachment A to receiving waters named: Belle Island Inlet, Boston Harbor, Boston Inner Harbor, Brook Far. Brook, Bussey Brook, Canterbury Brook, Chandler' s Pond, Charles River, Chelsea River, Cow Island Pond, Dorchester Bay, Fort Point Channel, Goldsmith Brook, Jamaica Pond, Little Mystic Channel, Mill Pond, Millers River, Mother Brook, Muddy River, Mystic River, Neponset River, Old Harbor, Patten' s Cove, Reserved Channel, Sprague Pond, Stony Brook, Turtle Pond and unnamed wetlands, brooks and streams.

in accordance with effluent limitations, monitoring requirements and other conditions set forth herein.

This permit shall become effective 30 days from date of signature. This permit and the authorization to discharge expire at midnight, five years from the effective date.

This permit consists of 20 pages and Attachment A in Part I including monitoring requirements, etc., and 35 pages in Part II including General Conditions and Definitions.

4;1;ctor , D ' isi n '- f Office of Ecosystem Protection Watershed Management Enyironmental Protection Agency Department of Environmental Region I Protection Boston Commonwealth of Massachusetts , MA Boston, MA ). ).

Page 2 of 20 Permit No. MASOIOOOl

PART MUICIPAL SEPARTE STORM SEWER SYSTEM

DISCHARGES THROUGH THE MUNICIPAL SEPARATE STORM SEWER SYSTEM AUTHORIZED UNER THIS PERMIT

permit Area. This permit covers all areas within the corporate boundary of the City of Boston or otherwise contributing to new or existing separate storm sewers owned or operated by the Boston Water and Sewer Commission , the "permittee"

2 - Authorized Discharges. This permit authorizes all storm water discharges to waters of the United States from all existing or new separate storm sewer outfalls owned or operated by the permittee (existing outfalls are identified in Attachment A This permit also authorizes the discharge of storm water commingled with flows contributed by wastewater or storm water associated with industrial activity provided such discharges are authorized under separate NPDES permits and are in compliance with applicable Federal, State and Boston Water and Sewer Commission regulations Regulations Regarding the Use of Sanitary and Combined Sewers and Storm Drains of the Boston Water and Sewer Commission The permittee shall provide a notification to EPA and MA DEP of all new separate storm sewer outfalls as they are activated and of all existing outfalls which are de- activated. The annual report part I. ) will reflect all of the changes to the number of outfalls throughout the year. Limitations on Coverage. Discharges of non-storm water or storm water associated with industrial activity through outfalls listed at Attachment A are not authorized under this permit except where such discharges are: authorized by a separate NPDES permit; or

identified by and in compliance with Part of this permit. Page 3 of 20 Permit No. MAS010001

STORM WATER POLLUTION PREVENTION & MAAGEMENT PROGRAS

The permittee is required to develop and implement a storm water pollution prevention and management program designed to reduce, to the maximum extent practicable the discharge of pollutants from the Municipal Separate Storm Sewer System. The permittee may implement Storm Water Management Program (SWMP) elements through participation with other public agencies or private entities in cooperative efforts satisfying the requirements of this permit in lieu of creating duplicate program elements. Either cumulatively, or separately, the permittee I s storm water pollution prevention and management programs shall satisfy the requirements of Part I. B . below for all portions of the Municipal Separate Storm Sewer System (MS4) authorized to discharge under this permit and shall reduce the discharge of pollutants to the maximum extent practicable. The storm water pollution prevention and management program requirements of this Part shall be implemented through the SWMP submitted as part of the permit application and revised as necessary.

POLLUTION PREVENTION REOUIREMENTS The permittee shall develop and implement the following pollution prevention measures as they relate to discharges to the separate storm sewer:

a. Development The permittee shall assist and coordinate with the appropriate municipal agencies with jurisdiction over land use to ensure that municipal approval of all new development and significant redevelopment proj ects wi thin the City of Boston which discharge to the MS4 is conditioned on due consideration of water quality impacts. The permittee shall cooperate with appropriate municipal agencies to ensure that development activities conform to applicable state and local regulations, guidance and policies relative to storm water discharges to separate storm sewers. Such requirements shall limit increases in the discharge of pollutants in storm water as a resul t of new development, and reduce the discharge of pollutants in storm water as a result of redevelopment.

b. Used Motor Vehicle Fluids The permittee shall coordinate with appropriate municipal agencies or private entities to assist in the implementation of a program to collect used motor vehicle fluids (including, at a minimum , oil and antifreeze) for recycle , reuse, or proper disposal. Such program shall be readily available to all residents of the City of Boston and publicized and promoted at least annually. Page 4 of 20 Permit No. MAS010001

c. Household Hazardous Waste (HHW) The permittee shall coordinate with appropriate municipal agencies or private entities to assist in the implementation of a program to collect household hazardous waste materials (including paint , solvents, pesticides, herbicides, and other hazardous materials) for recycle, reuse, or proper disposal and promote proper handling and disposal. Such program shall be readily available to all private residents. This program shall be publicized and promoted at least annually.

STORM WATER MAAGEMENT PROGRA REOUIREMENTS: The permittee shall continue to implement the Storm Water Management Program (SWMP) which it described in its May , 1993 storm water permit application and updated June 1995 and June 1998 in accordance with Section 402(p) (3) (B) of the Clean Water Act (CWA or "the Act"). This SWMP outlined in the permit application , including all updates, is approvable upon issuance of this permi t .

In accordance with Part I. E. Annual Report , no later

than March 1, 2000 the permittee shall describe all the updates which it has conducted and all additional measures it will take to satisfy the requirements of this permit and the goals of the storm water management program. The Controls and activities identified in the SWMP shall clearly identify goals, a description of the controls or activities, and a description of the roles and responsibilities of other entities I areas of applicability on a system, jurisdiction , or specific area basis. The permittee will specifically address its roles and activities as they relate to portions of the SWMP which are not under its direct control (e. g. street sweeping, HHW collection , development, redevelopment). The permit may be modified to designate the agencies that administer these programs as co- permittees or require a separate permit. These entities would then be responsible for applicable permi t conditions and requirements. The SWMP, and all

approved updates are hereby incorporated by reference and shall be implemented in a manner consistent with the f61lowing requirements: Page 5 of 20 Permit No. MAS010001

a. Statutory Requirements : The SWMP shall include controls necessary to reduce the discharge of pollutants from the Municipal Separate Storm Sewer System to the Maximum Extent Practicable (MEP). Controls may consist of a combination of best management practices, control techniques, system design and engineering methods, and such other provisions as the permittee, Director or the State determines appropriate. The various components of the SWMP, taken as a whole (rather than individually), shall be sufficient to meet this standard. The SWMP shall be updated as necessary to ensure conformance with the requirements of CWA ~ 402 (p) (3) (B). The permittee shall select measures or controls to satisfy the following water quality Qrohibitions: No discharge of toxics in toxic amounts

No discharqe of pollutants in quantities that would cause a violation of State water quality standards. No discharge of either a visible oil sheen, foam, or floatinq solids, in other than trace amounts.

b. Structural Controls The permittee shall operate and maintain all storm water structural controls which it owns or operates in a manner so as to reduce the discharge of pollutants to the MEP.

c. Areas of New Development and Significant Redevelopment: The permittee shall continue to implement its site plan review process and ensure compliance with its existing regulations. The permittee shall also coordinate with appropriate municipal agencies to assist in the development, implementation , and enforcement of controls to minimize the discharge of pollutants to the separate storm sewer system from areas of new development and significant re- development during and after construction. The permittee shall assist appropriate municipal agencies to ensure that development activities conform to applicable state and local regulations, guidance and policies relative to storm water discharges to separate storm sewers.

d. Roadways The permittee shall coordinate with appropriate agencies to assist in the implementation of measures to ensure that roadways and highways are operated and maintained in a manner so as to minimize the discharge of pollutants to the separate storm sewer system (including those related to deicing or sanding acti vi ties) g.

Page 6 of 20 Permit No. MAS010001

e. Flood Control Projects The permittee shall ensure that any flood management proj ects within its direct control are completed after consideration of impacts on the water quality of receiving waters. The permittee shall also evaluate the feasibility of retro- fitting existing structural flood control devices it owns or operates to provide additional pollutant removal from storm water. f. Pesticide, Herbicide, and Fertilizer Application The permittee shall cooperate with appropriate municipal agencies to evaluate existing measures to reduce the discharge of pollutants related to the application of pesticides, herbicides, and fertilizers applied by municipal or public agency employees or contractors to public right of ways, paiks, and other municipal facilities. The permittee shall evaluate the necessity to implement controls to reduce discharge of pollutants related to the application and distribution of pesticides, herbicides , and fertilizers by commercial and wholesale distributors and applicators. The permittee shall require controls, within its authority, as necessary. Illicit Discharges and Improper Disposal The permittee shall continue to implement its program to detect and remove illicit discharges (or require the discharger to the MS4 to remove or obtain a separate NPDES permit for the discharge) and improper disposal into the separate storm sewer. 1. The permittee shall effectively prohibit non- storm water discharges to the Municipal Separate Storm Sewer System , other than those authorized under this permit or a separate NPDES permit. 2. Unless identified by either the permittee, the Director , or the State as significant sources of pollutants to waters of the United States, the following non- storm water discharges are authorized to enter the MS4. As necessary, the permittee may incorporate appropriate control measures in the SWMP to ensure these discharges are not significant sources of pollutants to waters of the United States. (a) water line flushing; (b) landscape irrigation; (c) diverted stream flows; (d) rising ground waters; (e) uncontaminated ground water infiltration (as defined at 40 CFR 35. 2005 (20)) to separate storm sewers; (g)(j) (p) (q)

Page 7 of 20 Permit No. MAS010001

(f) uncontaminated pumped ground water discharges from potable water sources (h) foundation drains; (i) uncontaminated air conditioning or compressor condensate; irrigation water; (k) uncontaminated springs; (I) water from crawl space pumps; (m) footing drains; (n) lawn watering; (0) non-commercial car washing; flows from riparian habitats and wetlands; swimming pool discharges which have been dechlorinated; (r) street wash waters (s) discharges or flows from emergency fire fighting activities; (t) fire hydrant flushing; and (u) building washdown water which does not contain detergents. 3. The permittee shall prevent unpermitted discharges of dry and wet weather overflows from sanitary sewers into the MS4. The permittee shall implement a program to identify and limit the infiltration of seepage from sanitary sewers into the MS4. 4. The permittee shall prohibit the discharge or disposal of used motor vehicle fluids, household hazardous wastes, grass clippings, leaf litter, and animal wastes into separate storm sewers. The permittee must demonstrate that the prohibition is publicized at least annually, and that the information is available for non- English speaking residents of the City. 5. The permittee shall require the elimination of illicit connections as expeditiously as possible and the immediate cessation of improper disposal practices upon identification of responsible parties. The permittee shall describe its procedure for identification and elimination of illicit discharges. This information shall be

included in the annual report required under Part below. Where elimination of an illicit connection within sixty (60) days is not possible, the permittee shall establish a schedule for the expeditious removal of the discharge. In the interim, the permittee shall take all reasonable and prudent measures to minimize the discharge of pollutants to the MS4. Page 8 of 20 Permit No. MAS010001

h. Spill Prevention and Response The permittee shall cooperate with appropriate federal, state, and municipal agencies in the development and implementation of a program to prevent , contain , and respond to spills that may discharge into or through the MS4. The spill response program may include a combination of spill response actions by the permittee (and/or other public or private entities), and requirements for private entities through the permittee I s sewer use regulations. Except as explicitly authorized , materials from spills may not be discharged to Waters of the United States. i. Industrial & High Risk Runoff : In cQoperation with the DEP and EPA, the perm ttee shall implement a program to identify, monit6r, and control pollutants in storm water discharges to the MS4 from municipal landfills; hazardous waste treatment, storage, disposal and recovery facilities and facilities that are subject to EPCRA Title III, Section 313; and any other industrial or commercial discharge the permittee determines is contributing a substantial pollutant loading to the MS4. The program shall include: 1. priorities and procedures for inspections and establishing and implementing control measures for such discharges; 2. a monitoring (or self -moni toring) program for facilities identified under this section including the collection of quantitative data on the following constituents: (a) any pollutants for which the discharger may monitor or which are limited in an existing NPDES permit for an identified facility; (b) any information on discharges required under 40 CFR 122. 21 (g) (7) (iii) and (iv);

( c) any pollutant the permittee has a reasonable expectation is discharged in substantial quantity from the facility to the separate storm sewer system. Data collected by the industrial facility to satisfy the monitoring requirements of an NPDES or State discharge permit may be used to satisfy this requirement. The permittee may require the industrial facility to conduct self-monitoring to satisfy this requirement. j.

Page 9 of 20 Permit No. MAS010001

Construction Site Runoff : The permittee shall continue to implement its site plan review process and ensure compliance with its existing regulations. The permittee shall also cooperate with appropriate municipal agencies in the development and implementation of a program to reduce the discharge of pollutants from construction sites to the MS4 including: 1. requirements for the use and maintenance of appropriate structural and non-structural best management practices to reduce pollutants discharged to the MS4 during the time construction is underway;

2. procedures for site planning which incorporate considerations for potential short term and long term water quality impacts and measures to minimize these impacts; 3. prioritized inspection of construction sites and enforcement of control measures as required by the permittee;

4. providing assistance to appropriate municipal agencies in the development of education and training measures for construction site operators; and 5. providing assistance to appropriate municipal agencies in the development of a notification to appropriate building permit applicants of their potential responsibilities under the NPDES permitting program for construction site runoff.

k. public Education The permittee in coordination with other appropriate municipal agencies, shall implement a public education program including, but not limited to: 1. A program to promote , publicize , and facilitate public reporting of the presence of illicit discharges or improper disposal of materials (e. g. industrial and commercial wastes, trash , used motor vehicle fluids, leaf litter, grass clippings, animal wastes i etc. ) into the MS4 (e. g. curb inlet stenciling, citizen II streamwatch"

groups "hotlines" for reporting dumping, outreach materials included in billings, advertising on public access/government cable channels, etc. Page 10 of 20 Permit No. MAS010001

2. a program to promote, publicize, and facilitate the proper management and disposal of used oil vehicle fluids and lubricants, and household hazardous wastes; 3. a program to promote , publicize, and facilitate the proper use, application, and disposal of pesticides, herbicides, and fertilizers; 4. where applicable and feasible, the permittee should publicize those best management practices (including but not limited to the use of reformulated or redesigned products, substitution of less toxic materials, and improvements in housekeeping) developed by municipal agencies or environmental organizations that facilitate better use, application , and/or disposal of materials identified in k. 1 - k, 3 of this section. DEADLINES FOR PROGRA COMPLIANCE Except as provided in PART II, and Part I. B. 7. the permittee shall continue to implement its Storm Water Management Program, ROLES AN RESPONSIBILITIES OF PERMITTEE: The Storm Water Management Program shall clearly identify the roles and responsibilities of the permittee and appropriate municipal agencies impacting its efforts to comply with this permit.

LEGAL AUTHORITY: The permittee has demonstrated and shall maintain legal authority to control discharges to and from those portions of the MS4 which it owns or operates. This legal authority may be a combination of statute, regulation , permit, contract , or an order to: a. Control the contribution of pollutants to the MS4 by storm water discharges associated with industrial activity and the quality of storm water discharged from sites of industrial activity; Prohibit illicit discharges to the MS4; c. As necessary, control the discharge of spills and the dumping or disposal of materials other than storm water (e. g. industrial and commercial wastes, trash, used motor vehicle fluids, leaf litter , grass clippings, animal wastes etc. ) into the MS4; d. Control through interagency or inter- jurisdictional agreements the contribution of pollutants from one portion of the MS4 to another; Page 11 of 20 Permit No. MAS010001 e. Require compliance with conditions in regulations, permits, contracts or orders and f. Carry out all inspection , surveillance and monitoring procedures necessary to determine compliance with permit conditions. STORM WATER MAAGEMENT PROGRA RESOURCES The permittee shall provide adequate finances, staff , equipment, and support capabilities to implement its SWMP.

STORM WATER MAAGEMENT PROGRA REVIEW AN MODIFICATION a. Demonstration proj ect : Wi thin 180 days of the effective date of the permit the permittee shall submit a plan to assess the effect veness of existing non- structural BMPs. This plan shall identify a drainage area or sub-area which has undergone an investigation for illicit connections and is believed to be reasonably free of sanitary sewer influence. The plan shall clearly specify activities to be conducted, responsible parties and method of assessment. The proj ect shall commence within one year of the effective date of the permit and continue for at least one year. Wi thin 90 days of proj ect complet ion the permittee shall submit a report which identifies measures undertaken and effectiveness of those measures.

b. Program Review The permittee shall participate in an annual review of its current SWMP in conjunction with preparation of the annual report required under Part I. E . This annual review shall include: 1. A review of the status of program implementation and compliance with program elements and other permit conditions as necessary;

2. An assessment of the effectiveness of controls established by the SWMP;

3. A review of monitoring data and any trends in estimated cumulative annual pollutant loadings;

4. An assessment of any SWMP modifications needed to comply with the CWA ~402 (p) (3) (B) (iii) requirement to reduce the discharge of pollutants to the maximum extent practicable (MEP). 5. An assessment of staff and funding levels adequate to comply with the permit conditions. Page 12 of 20 Permit No. MAS010001

c. Proqram Modification The permittee may modify the SWMP in accordance with the following procedures:

1. The approved SWMP shall not be modified by the permittee (s) without the prior approval of the Director, unless in accordance with items c. 2. or 3. below. 2. Modifications adding (but not subtracting or replacing) components, controls, or requirements to the approved SWMP may be made by the permittee at any time upon written notification to the Director. 3. Modifications replacing or eliminating an ineffective or infeasible BMP specifically identified in the SWMP with an alternative BMP may be requested at any time. Unless the Director comments on or denies the request within 60 days from submittal, the permi t tee shall implement the modification and proposed schedule. Such requests must include the following: (a) an analysis of why the BMP is ineffective or infeasible (including cost considerations) (b) expectations on the effectiveness of the replacement BMP and proposed schedule for implementation, and

(c) an analysis of why the replacement of the BMP is expected to achieve the goals of the BMP to be replaced,

(d) in the case of an elimination of the BMP an analysis of why the elimination is not expected to cause or contribute to a water quality impact.

4. Modification requests and/or notifications must be made in writing and signed in accordance with Part I I . D . 2 . Page 13 of 20 Permit No. MAS010001

d. Modifications required by the permitting Authority The Director or the State may require the permittee to modify the SWMP as needed to: 1. Address impacts on receiving water quality caused, or contributed to, by discharges from the MS4 ;

2. Include more stringent requirements necessary to comply with new State or Federal statutory or regulatory requirements; or 3. Include such other conditions deemed necessary by the Director to comply with the goals and requirements of the Clean Water Act.

Modifications required by the Director shall be made in writing and set forth a time schedule for the permittee to develop the modification (s) . WET WEATHER MONITORING AN REPORTING REQUIREMENTS Storm Event Discharges The permittee shall implement a wet-weather monitoring program for the MS4 to provide data necessary to assess the effectiveness and adequacy of control measures implemented under the SWMP; estimate annual cumulative pollutant loadings from the MS4; estimate event mean concentrations and seasonal pollutants in discharges from all outfalls; identify and prioritize portions of the MS4 requiring additional controls, and identify water quality improvements or degradation. Improvement in the quality of discharges from the MS4 will be assessed based on the monitoring information required by this section, along with any additional pertinent information. There have been no numeric effluent limits established for this permit. Further monitoring or effluent limits may be established to ensure compliance with the goals of the Clean Water Act, appropriate Water Quality Standards, or applicable technology based requirements. Page 14 of 20 Permit No. MAS010001

a. Representative Monitoring Within 90 days after the effective date of this permit , the permittee shall submit a proposed sampling plan. The permittee shall monitor a minimum of five (5) representative drainage areas to characterize the quality of storm water discharges from the MS4. The proposed sampling plan shall consider monitoring each site three (3) times a year for a period of at least two years. All five sites shall be completed within the five year permit term and may be done partially or consecutively. The permittee shall choose locations representing the different land uses or is representative of drainage areas served by the MS4. The permi t tee may submit an alternative plan for sampling frequency only subject to the approval of EPA and DEP. At a minimum , the monitoring program shall analyze for the following parameters: pH, Temperature, Dissolved Oxygen , Total Suspended Solids, BODS, COD , Fecal Coliform , Total Nitrogen , Nitrate/Nitrite , Ammonia (as N), Total Phosphorous, Ortho- Phosphate, Oil and Grease , Total Petroleum Hydrocarbons, Surfactants, Fluoride, Copper and Zinc. Unless commented on or denied by the Director within 60 days after its submittal , the proposed sampling plan shall be deemed approved. This monitoring program shall commence no later than 180 days from the effective date of the permit unless otherwise specified by EPA and DEP. Subsequent monitoring locations and parameters for the remainder of the permit term shall be determined based upon the results of these sampling locations and other water quality information available to EPA, DEP and the permittee.

b. Receiving Water Quality Monitoring The permittee shall monitor a minimum of four (4 ) receiving waters three (3) times a year throughout the permit term to characterize the water quality impacts of storm water discharges from the MS4. Sampling shall be conducted during a storm event that is greater than 0. 1 inches in magnitude and that occurs at least 72 hours from the previously measurable (0. 1 inch) . storm event. Within days after the effective date of this permit, the permi t tee shall submit its proposed sampling plan. a minimum , the monitoring program shall analyze for the following parameters: pH , Temperature, Dissolved Oxygen , Total Suspended Solids, BODS, COD , Fecal Coliform , Total Nitrogen, Nitrate/Nitrite , Ammonia (as N), Total Phosphorous, Ortho- Phosphate , Oil and Grease, Total Petroleum Hydrocarbons, Surfactants, Fluoride

Copper and Zinc. Unless commented on or denied by the

Director within 60 days after its submittal , the proposed sampling plan shall be deemed approved. This monitoring program shall commence no later than six months after the effective date of the permit. Page 15 of 20 Permit No. MAS010001

c. Alternate Representative Monitoring: Monitoring locations may be substituted for just cause during the term of the permit. Requests for alternate monitoring locations by the permittee shall be made to the Director in writing and include the rationale for the requested monitoring station relocation. Unless commented on or denied by the Director , use of an alternate monitoring location may commence sixty (60) days from the date of the request.

Storm Event Data : For Part I. C . 1. a Data shall be collected to estimate pollutant loadings and event mean concentrations for each parameter sampled. The permittee shall maintain records of the date and duration (hours) of the storm event sampled; rainfall measurements or estimates (inches) of the storm event which generated the sampled runoff; the duration (hours) between the storm event -sampled and the end the previous measurable (greater than 0. 1 inch rainfall) storm event; and the total estimated volume (in gallons) of the discharge sampled. If manual sampling is employed, the permittee shall record physical observations of the discharge such as color and smell; and visible water quality impacts such as floatables, oil sheen , or evidence of sedimentation in the vicinity of the outfall (e. g. sandbars). Sample Type, Collection, and Analysis The following requirements apply to samples collected pursuant to Part I.C. 1.a. a. For discharges from holding ponds or other impoundments with a retention period greater than 24 hours, (estimated by dividing the volume of the detention pond by the estimated volume of water discharged during the 24 hours previous to the time that the sample is collected) a minimum of one grab sample may be taken. b. Grab samples shall be used for the analysis of pH, temperature, cyanide, total phenols, residual chlorine, oil & grease, fecal coliform, and fecal streptococcus. For all other parameters, data shall be reported for flow weighted composite samples of the entire event or at a minimum , the first three hours of discharge. ) .

Page 16 of 20 Permit No. MAS010001 c. All such samples shall be collected from the discharge resulting from a storm event that is greater than 0. 1 inches in magnitude and that occurs at least 72 hours from the previously measurable (greater than 1 inch rainfall) storm event. Composite samples may be taken with a continuous sampler or as a combination of a minimum of three sample aliquots taken in each hour of discharge for the entire discharge or for the first three hours of the discharge, with each aliquot being separated by a minimum period of fifteen minutes. d. Analysis and collection of samples shall conducted in accordance with the methods specified at 40 CFR Part 136. Where an approved Part 136 method does not exist, any available method may be used.

Sampling Waiver When the permittee is unable to collect samples required by Part I. C. 1 . a due to adverse climatic conditions, the discharger must submit, in lieu of sampling data, a description of why samples could not be collected, including available documentation of the event. Adverse climatic conditions which may prohibit the collection of samples include weather conditions that create dangerous conditions for personnel (such as local flooding, high winds, hurricane, tornadoes, electrical storms, etc. or otherwise make the collection of a sample impracticable (drought, extended frozen conditions, etc. Sampling Results The permittee shall record the results of sampling and assessment of the data in a report and submit results with its Annual Report. Wet Weather Screening The permittee shall develop and implement a program to identify, investigate, and address areas within their jurisdiction that may be contributing excessive levels of pollutants to the MS4 as a result of rainfall or snow melt. Screening shall be conducted at anytime precipitation causes a flow from the storm sewer. At a minimum the wet weather screening program: a. shall screen all maj or outfalls at least once during the permit term b. shall record the structural integrity of the outfall (if visible); physical observations of the discharge (if visible) such as color and smell; and visible water quality impacts such as floatables, oil sheen , or evidence of sedimentation in the vicinity of the outfall (e. g. sandbars). Page 17 of 20 Permit No. MAS01000l c. shall summarize the results of the program in its Annual Report. d. The permittee may submit an alternate wet weather screening pilot program on a watershed or sub-watershed basis. The pilot proj ect concept must be submitted to EPA and DEP within 90 days of the effective date of the permit. The permittee shall identify reasons it believes that a system wide screening program would not be effective. The pilot project may be conducted in conjunction with Receiving Water Quality Monitoring (C. ), but not Representative Monitoring(C.

DRY WEATHER DISCHARGES Dry Weather Screening Program : At least once during the permit term, the permittee shall inspect all maj outfalls, or nearest upstream location not subj ect tidal influence or backflow , during dry weather to identify those outfalls with dry weather flow. Dry weather screening shall be conducted when there has been no greater than 0. 10 inches of precipitation in the 72 hours prior to screening. The permittee shall record the structural integrity of the outfall (if visible). If flow is observed, the permittee shall record physical observations such as color, visible sheen , turbidity, floatables, smell, and an estimate of flow. If sewage is suspected, the permittee shall develop a schedule for follow-up activities to eliminate the source as soon as is practicable. The permittee shall summarize the results in its Annual Report Screening Procedures : Screening methodology need not conform to the protocol at 40 CFR ~122. 26 (d) (1) (iv) (D) 13 6. or sample and collection methods of 40 CFR Follow- up on Dry Weather Screening Results : Follow­ acti vi ties shall be prioritized on the basis of: magnitude and nature of the suspected discharge; sensi ti vi ty of the receiving water; and other factors the permittee deems appropriate.

The permittee shall summarize the results of dry weather screening and submit with its Annual Report. Page 18 of 20 Permit No. MAS01000l

ANAL REPORT: The permittee shall prepare and submit an annual report to and annually be submitted by no later than March 1, 2000 thereafter. The report shall include the following separate sections, with an overview for the entire MS4: The status of implementing the storm water management program ( s) ; Proposed changes to the storm water management

program (s)

Revisions, if necessary, to the assessments of controls and the fiscal analysis reported in the permit application under 40 CFR 122. 26 (d) (2) (iv) and (d) (2) (v) ; A summary of the data, including monitoring or screening data, that is accumulated throughout the report ing year; A revised list of all current separate storm sewer outfalls and their locations, reflecting changes of the previous year. Annual expenditures for the reporting period, with a breakdown of the maj or elements of the storm water management program, and the budget for the year following each annual report as well as an assessment of adequacy of staffing and equipment; A summary describing the number and ' nature enforcement actions, inspections, and public education programs; Identification of water quality improvements or degradation attributable to the permittee;

An analysis of the effectiveness and removal efficiencies of structural controls owned or operated by the permittee (such as the off- line particle separator in Fenwood Road); and, Page 19 of 20 Permit No. MAS01000l

10. An update on the illicit connection program to include the total number of identified connections with an estimate of flow for each , total number of connections found in the reporting period to include how they were found (i. e. citizen complaint, routine inspection), number of connections corrected in the reporting period to include total estimated flow , and the costs of such repairs to include how the repairs were financed (i. e. by the permittee, costs provided to the permittee by the responsible party, repairs effected and financed by the responsible party). As an attachment to the report, the permittee should submit any existing tracking system information.

CERTIFICATION AN SIGNATURE OF' REPORTS All reports required by the permit and other information requested by the Director shall be signed and certified in accordance with the General Conditions- Part II of this permit.

REPORT SUBMISSION Original signed copies of all notifications and reports required herein , shall be submitted to the Director at the following address: Environmental Protection Agency NPDES PROGRAS (SPA) P . 0. Box 8127 Boston , MA 02114 Signed copies of all notifications and reports shall be submitted to the State at: Massachusetts Department of Environmental Protection 1 Winter Street Boston, MA 02108 Attn: Mr. Steve Lipman and Massachusetts Department of Environmental Protection Metro Boston/Northeast Regional Office 205A Lowell Street Wilmington , MA 01887 At tn: Mr. Sabin Lord Page 20 of 20 Permit No. MAS01000l

RETENTION OF RECORDS

The permittee shall retain all records of all monitoring information, copies of all reports required by this permit and records of all other data required by or used to demonstrate compliance with this permit, until at least three years after coverage under this permit terminates. This period may be modified by alternative provisions of this permit or extended by request of the Director at any time The permittee shall retain the latest approved version of the SWMP developed in accordance with Part I of this pennit until at least three years after coverage under this permit terminates.

STATE PERMIT CONDITIONS This Discharge Permit is issued jointly by the U. Environmental Protection Agency (EPA) and the Massachusetts Department of Environmental Protection under Federal and State law , respectively. As such, all the terms and conditions of this permit are hereby incorporated into and constitute a discharge permit issued by the Commissioner of the Massachusetts DEP pursuant to M. L. Chap. 21, ~43. Each Agency shall have the independent right to enforce the terms and conditions of this Permit. Any modification , suspension or revocation of this Permit shall be effective only with respect to the Agency taking such action , and shall not affect the validity or status of this Permit as issued by the other Agency, unless and until each Agency has concurred in writing with such modification , suspension or revocation. the event any portion of this Permit is declared, invalid, illegal or otherwise issued in violation of State law such permit shall remain in full force and effect under Federal law as an NPDES Permit issued by the U. S. Environmental Protection Agency. In the event this Permit is declared invalid , illegal or otherwise issued in violation of Federal law, this Permit shall remain in full force and effect under State law as a Permit issued by the Commonwealth of Massachusetts. - -- ()_-"-'- -_._------+------,,_ -'--' --_. ,-,-- ,,­..--

TTACHMENT A BOSl vN WATER AND SEWER COMMISSION STORMWATER OUTFALLS

OUTFALL OUTFALL LOCATION NEIGHBORHOOD SIZE TIDEGA TES RECEIVING WA TER NUMBER TYPE (INCHES) NO, OF GATES NUMBER

08B066 MAJOR EASEMENT /VFW PARKWAY WEST ROXBURY CHARLES RIVER

08Bl22 MAOR EASEMENT /NORTH OF SPRING WEST ROXBURY CHARLES RIVER STREET

08B126 MINOR SPRING STREET EXTENDED WEST ROXBURY CHALES RIVER COW ISLA POND/ CHARLES 09B049 MAJOR EASEMENT/RIVERMOOR STREET WEST ROXBURY RIVER COW ISLA POND/ CHARLES 10B015 MAJOR EASEMENT /CHARLES PARK ROAD WEST ROXBURY RIVER

11B123 MAOR EASEMENT /EAST OF BAKER ST, WEST ROXBURY BROOK FAR BROOK EXT,

12B010 MINOR BAKER STREET WEST ROXBURY BROOK PARM BROOK

12B014 MINOR BAKER STREET WEST ROXBURY BROOK FARM BROOK

12B031 MINOR EASEMENT /BAKER STREET WEST ROXBURY BROOK FAR BROOK

12B033 MINOR EASEMENT /BAKER STREET WEST ROXBURY BROOK FAR BROOK

12B124 MAOR EASEMENT/LaGRAGE STREET WEST ROXBURY 120xl02 BROOK FAR BROOK

13B002 MINOR LaGRAGE STREET WEST ROXBURY UNAMED STREAM

13BDll MINOR LaGRAGE STREET WEST ROXBURY UNAMED STREAM

06C110 MAJOR EASEMENT /PLEASANALE ST, WEST ROXBURY NONE SHOWN EXT,

07C006 MAJOR EASEMENT /VFW PARKWAY/BELLE WEST ROXBURY 126x126 CHARLES RIVER AVENUE

08C318 MAOR WEDGEMERE ROAD WEST ROXBURY NONE SHOWN

08C319 MINOR WEDGEMERE ROAD WEST ROXBURY UNAMED STREAM

14C009 MAOR EASEMENT /WESTGATE ROAD WEST ROXBURY UNAMED WETLAS

21C212 MINOR EASEMENT/LAKE SHORE ROAD ALLSTON/BRIGHTON CHALERS POND

22C384 MAJOR EASEMENT /LAKE SHORE ROAD ALLSTON/BRIGHTON CHALERS POND

24C174 MINOR EASEMENT /NEWTON STREET ALLSTON/BRIGHTON 9x20 CHARLES RIVER

24C031 MAJOR PARSONS STREET ALLSTON/BRIGHTON 60X60 CHARLES RIVER

060057 MINOR CEDAR CREST CIRCLE WEST ROXBURY NEPONSET RIVER WETLANS/CHARLES RIVi 060083 MINOR MARGARETTA DRIVE WEST ROXBURY WETLANS/CHARLES RIVER 060084 MINOR EASEMENT /MARGARETTA DRIVE WEST ROXBURY WETLANS/CHARLES RIVE o 6DO 8 5 MINOR GEORGETOWN DRIVE r,.EST ROXBURY WETLANS/CHARLES RIVER 060086 MINOR ! GEORGETOWN DRIVE i WEST ROXBURY 1__ WETLANS/CHAR iIVER ­ 060091 MINOR GEORGETOWN DRIVE i WEST ROXBURY WETLANS/CHARLES RIVER 060184 MINOR GEORGETOWN DRIVE i WEST ROXBURY BROOK GROVE STREET 060187 MAJOR EASEMENT /GROVE STREET - ROXBURY CEMETERY

130077/078 MAJOR vJEST ROXBURY PJ\RK';'iA Y'/VFfti /iSST ROXBURY 2 - GO BUSSEY BROOK PARKWAY NORTH BEACON STREET , ABOUT 240032 MAJOR 800' EAST OF PARSONS STREET ALLSTON / BR IGHTON 119X130 1 / 240032­ CHARLES RIVER

240150 MAJOR SOLDIERS FIELD PLACE ALLSTON/BRIGHTON CHARLES RIVER ABOUT 390 I NORTH OF 250033 fvlJOR INTERSECTION OF SOLDIERS ! ALLSTON/BRIGHTON 36 CHARLES RIVER FIELD ROAD & WESTERN AVENUE SPRAGUE POND/NEPONSET 01E024 MAJOR EASEMENT ILAKESIDE HYDE PARK RIVER

038185 MAJOR NORTON STREET HYDE PARK WETLANS/NEPONSET RIVER

03E186 RIVER STREET j HYDE PARK MILL POND/MOTHER BROOK

038207 MINORI-, RIVER STREET I HYDE PARK MILL POND/MOTHER BROOK ..,-.--~~~~-.- -_. ---- :: ::;-- .- --- - (-,---- - ,- -- -- .._-- ::::::--- :::: - - fTACHMENT A BOS10N WATER AND SEWER COMMISSION STORMWATER OUT FALLS MILL POND/MOTHER BROOK 048064 MINOR ALVARADO AVE /RIVER STREET HYDE PARK BRIDGE J- MOTHER BROOK 04E069 MAJOR I KNIGHT STREET DAM HYDE PARK

NONE SHOWN/CHARLES RIVER 05E180 MINOR GEORGETOWN DRIVE HYDE PARK

NONE SHOWN/CHARLES RIVER 05E181 MINOR GEORGETOWN DRIVE HYDE PARK UNAMED STREAM/CHALES RIVER 05E182 MINOR DEDHA STREET HYDE PARK UNAMED STREAM 05E183 MINOR GEORGETOWN PLACE/DEDHAM HYDE PARK PARKWAY

TURTLE POND 08E031 MINOR TURTLE POND PARKWAY WEST ROXBURY TUTLE POND 08E033 MINOR TURTLE POND PARKWAY WEST ROXBURY UNKNOWN TUTLE POND 08E035 MINOR WASHINGTON STREET WEST ROXBURY NONE SHOWN 09E229 MINOR GRAVIEW STREET WEST ROXBURY UNAMED STREAM 09E243 MAJOR BLUE LEDGE TR, /EASEMENT WEST ROXBURY BUSSEY BROOK 13E174 MINOR EASEMENT /VFW PARKWAY ROSLINDALE BUSSEY BROOK 13E175 MAOR EASEMENT/VFW PARKWAY ROSLINDALE 108X86

NONE SHOWN 13E176 MAJOR EAS EMENT /WELD STREET ROXBURY CHARLES RIVER 25E037 MAJOR EASEMENT /TELFORD STREET ALLSTON/BRIGHTON EXTENDED

NEPONSET RIVER OlF031 MAJOR EASEMENT/MILLSTONE ROAD HYDE PARK 48x24 NEPONSET RIVER RESERVATION 02F085 MINOR LAWTON STREET HYDE PARK NEPONSET RIVER 02F093 MAJOR EASEMENT/SIERRA ROAD HYDE PARK EASEMENT/WOLCOTT CT , /HYDE NEPONSET RIVER 02F120 t'.AJOR PARK AVE. EXT. HYDE PARK MOTHER BROOK/NEPONSET RIVER 04F016 MAJOR EASEMENT RIVER STREET HYDE PARK NEPONSET RIVER 04F118 MINOR MASON STREET EXT. HYDE PARK EASEMENT /HYDE PARK NEPONSET RIVER 04 F1l9 MAJOR AVE. /RESERVATION RD. HYDE PARK MOTHER BROOK/NEPONSET RIVER 04F189 t1AJOR RESERVATION ROAD HYDE PARK NONE SHOWN/NEPONSET RIVER 04F191 MINOR FARAAY STREET HYDE PARK NEPONSET RIVER 04F203 MINOR GLENWOOD AVE HYDE PARK NEPONSET RIVER 04F204 MAJOR TRUMA HWY - /CHITTICK STREET HYDE PARK

NEPONSET RIVER 05 Fll 7 MAJOR EASEMENT /TRUM HYDE PARK HWY, /WILLIAMS AVE, MOTHER BROOK/NEPONSET RIVER 05F244 MINOR HYDE PARK AVENUE BRIDGE HYDE PARK 20 I RIVMOTHER BROOK/NEPONSET MINOR ARK AVENUE HYDE PARK- 1 33 J- H'"", MOTHER BROOK/NEPONSET EASEMENT/BUSINESS ST. NEAR 48x24 RIVER 05F253 MAJOR BUSINESS TERRACE HYDE PARK MINOR DANA AVENUE HYDE PARK NEPONSET RIVER 05F254 MOTHER BROOK/NEPONSET RIVER 5F265 MAJ -= MASON CO. HYDE PARK 1-­ j WETi:AND - sr-NYROOK 1-­ 15 RESERVATION 06F2J3 t'lINOR MOUNT ASH ROP,D I HYDE PARK UNK .

NONE SHOWN 12F322 MINOR EASEMENT/WALTER STREET ROSLINDALE BUSSEY BROOK 13 FO 9 5 MINOR EASEMENT/BUSSEY STREET ROSLINDALE

14 FIBI MAJOR __ ENT TREET EXTENS ION ROSLINDAL -=J , --===--GCLDSMITH BRO?~_

NDALE --USSEY BROOK -,. 14F185 -- 1 ALL ALE STREET ROSLI

ISF288 MAJOR ARNOLD ARBORETUM/MURRAY CIRCLE ARNOLD ARBORETU 100' EAST lSF307 MAJOR OF ARBORWAY & SAINT JOSEPH STREET t;: JAMAICA POND 17 Fa 12 MINOR FRACIS PARKMA DRIVE JAMAICA PLAIN -_.. --- '-----'------,..

TTACHMENT A BOSTol" WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

RIVER 26 FO 3 8 MAJOR HARVARD STREET EXT. ALLSTON /BR IGHTON +-!RLES

05G1l2 MAJOR EASEMENT/RR ROW/WATER ST, HYDE PARK NEPONSET RIVER EXT,

05G1l5 MINOR FAIRMOUN AVENUE BRIDGE HYDE PARK NEPONSET RIVER (NORTH BANK)

NEPONSET RIVER 05G1l6 MINOR FAIRMOUN AVE, BRIDGE HYE PARK (SOUTH BANK)

NEPONSET RIVER 05G1l6A MINOR WARREN AVENUE HYDE PARK

06GI08 MAOR EASEMENT/WEST OF WOOD AVE, HYDE PARK NEPONSET RIVER EXT, RIVER TERRCE EXT, NEAR 06G109 MAOR ROSA STREET HYDE PARK NEPONSET RIVER

06GllO MAOR EASEMENT /WEST STREET EXT, HYDE PARK NEPONSET RIVER

NEPONSET RIVER 06Gl11 MINOR EASEMENT /VOSE STREET EXT" HYDE PARK TRUM HWY,

NEPONSET RIVER 06G165 MINOR TRUM HIGHWAY/METROPOLITAN HYDE PARK AVE ABOUT 30 FEET FROM 06G166 MAJOR GUARDRAIL NORTHERLY SIDE OF HYE PARK 3 6x3 6 NEPONSET RIVER TRUM HIGHWAY NEAR MILTON LINE,

CANERBURY BROOK llG318 MINOR CULVERT UNER WALK HILL ROSLINDALE STREET

CANERBURY BROOK llG319 MINOR CULVERT UNER WALK HILL ROSLINDALE STREET

CANERBURY BROOK llG344 MAJOR CULVERT UNER WALK HILL ROSLINDALE 162X78 STREET

18G233 MINOR WILLOW POND ROAD JAMICA PLAIN MUDDY RIVER ROXBURY /MISS ION 19G043 MAOR HUNINGTON AVENUE HALL 4Sx45 MUDDY RIVER ROXBURY /MI SS ION RIVER 19G194 MINOR HUNTINGTON AVEWJE HILL MUDDY ROXBURY /MISSION 19G199 MINOR JAMICA WAY HILL MUDDY RIVER ROXBURY/MISSION 20G161 MAJOR EASEMENT /BROOKLINE AVENUE HILL MUDDY RIVER ROXBURY /MISS ION 20G163 MINOR EASEMENT /RIVERWAY HILL MUDY RIVER EASEMENT/MASS TURNPIKE/WEST CHARLES RIVER 2 3G13 2 MAJOR OF B. U. BRIDGE ALLSTON/BRIGHTON SOLDIER' S FIELD ROAD, SOUTH RIVER 24G034 MAJOR OF CAMBRIDGE STREET ALLSTON/BRIGHTON 1 / 24G034- CHARLES

CHARLES RIVER 2 4GO 3 5 MAJOR SOLDIERS FIELD ROAD/BABCOCK ALLSTON/BRIGHTON 90x84 STREET

CHARLES RIVER 25G005 MINOR I FROM WESTERN AVENUE BRIDGE ALLSTON/BRIGHTON ROAD/NORTH I CHARLES RIVER 25G041 MINOR -rSOLDIERSOF WESTERN FIELD AVENUE BRIDGE ALLSTON /BRIGHTON

NEPONSET RIVER 06HI06 MINOR OSCEOLA STREET HYDE PARK

06HI07 MAJOR EASEMENT /BELNEL ROAD HYDE PARK NEPON$ET RIVER EASEMENT /EDGEWATER/ SOUTH Q7HIOS M.1JJOR RIVER STREET NEPONSET !MATTAPAN l02x72 i I NEPONSET RIVER i-­ l06x63 NEPONSET RIVER 07H285 MAJOR BLUE HILL AVENUE NEPONSET /MATTAPAN

NEPONSET RIVER Q7H287 MINOR RIVER STREET /EDGEWATER NEPONSET /MATTAPAN DRIVE

07H346 MINOR EDGEWATER DRIVE/HOLMFIELD HYDE PARK NEPONSET RIVER \!ENUE I-­ L_, l-­07H347 MINOR EDGEWATER DRJVE/BURMAH ROAD NEPONSET /MATTAPAN NEPQNSET RIVER 07H348 MINOR ! EDGEWATER DRIVE/TOPALIAN NEPONSET /MATTAPAN NEPONSET RIVER STREET

CANTERBURY BROOK 12H085 MINOR MORTON STREET ROSLINDALE

CANTERBURY BROOK MAJOR AMERICAN LEGION HIGHWAY WEST ROXBURY 1-'

21H047 MINOR PALACE ROAD EXT. BOSTON PROPER MUDDY RIVER - _ -,_ " . - ' ------, ------'--.------

TTACHMENT A BOStoN WATER AND SEWER COMMISSION STORMWATER OUTFALLS

21H048 MINOR EASEMENT /FENWAY /EVANS WAY BOSTON PROPER MUDDY RIVER

21H201 MINOR PALACE ROAD EXT- BOSTON PROPER MUDDY RIVER

23H040 MINOR RALEIGH STREET EXT, BOSTON PROPER CHALES RIVER

23H042 MAOR DEERFIELD STREET BOSTON PROPER 116x120 CHARLES RIVER

081153 MINOR DUXBURY ROAD NEPONSET /MATIAPAN NEPONSET RIVER

081154 MINOR EASEMENT /RIVER NEPONSET /MATIAPAN NEPONSET RIVER STREET/GLADS IDE AVE

081155 MINOR EASEMENT /RIVER NEPONSET /MATIAPAN NEPONSET RIVER STREET/MAELON CIR

081156 MINOR EASEMENT /R IVER NEPONSET /MATTAPAN NEPONSET RIVER STREET /MAELON CIR

081158 MINOR EASEMENT /RIVER NEPONSET /MATTAPAN NEPONSET RIVER STREET /PREMONT ST,

081207 MINOR MEADOWBANK AVENUE EXT, NEPONSET /MATTAPAN NEPONSET RIVER

081209 MINOR MEADOWBANK AVENUE EXT, NEPONSET /MATTAPAN NEPONSET RIVER llI577 MAOR HAVAR STREET NEPONSET /MATIAPAN l02xl02 CANERBURY BROOK

08J041 MINOR RIVER STREET DORCHESTER NEPONSET RIVER

08JI02 MINOR ADAMS STREET DORCHESTER lSx15 NEPONSET RIVER

08JI0J MAJOR EASEMENT/CENTRAL AVENUE DORCHESTER NEPONSET RIVER BRIDGE

08J49/50 MAJOR DESMOND ROAD DORCHESTER 18&24 NEPONSET RIVER

26J052 MINOR MONSIGNOR 0 I BRIEN HIGHWAY BOSTON PROPER CHALES RIVER

26J055 MINOR LEVERETT CIRCLE BOSTON PROPER 1 / NOT MAPPED CHALES RIVER

27JOOI MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN MILLERS RIVER

27J044 MAJOR PRISON POINT BRIDGE CHALESTOWN MI LLERS RIVER

27J096 MAOR EASEMENT/INTERSTATE 93 CHARL8STOWN MILLERS RIVER

29J029 MINOR ALFORD STREET/RYAN PLGD- CHARLES TOWN MYSTIC RIVER EXT ­

29J129 MINOR ALFORD STREET CHALES TOWN MYSTIC RIVER EASEMENT /MEDFORD STREET 29J212 MAJOR (ALSO OF017) CHARLESTOWN MYSTIC RIVER

30J006 MAJOR EASEMENT/ALFORD STREET CHARLESTOi'lN MYSTIC RIVER

30J019 MAJOR ALFORD STREET CHARLESTOW'N MYSTIC RIVER

30J030 MAJOR EASEMENT/ARLINGTON AVENUE CHARLESTOWN 1 / NOT MAPPED MYSTIC RIVER

08K049 MINOR BEARSE AVENUE DORCHEST2R I' NEPONSET R

09K016 MINOR EASEMENT/BEARSE AVENUE EXT, DORCHESTER NEPONSET RIVER , n

09KI00 MAJOR EASEMENT /MELLISH ROAD DORCHESTER 34X24 NEPONSET RIVER

09K10l MINOR I EASEMENT/HUNTOON STREET DORCHESTER NEPONSET RIVER L"."T L-­

21K069 MAOR I EAST BERKE :-STREET STON PROPER 1 / 21K069­ FORT POINT CHAEL

26K099 MAJOR CHELSEA STREET EXT, CHALESTOWN CHALES RIVER fTACHMENT A

BOSTv, WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

26K245 MINOR EASEMENT CHALESTOWN CHARLES RIVER

28K018 MAOR OLD LAING WAY EXT, CHALESTOWN 1 / 28K058 LITTLE MYSTIC CHAEL

28K061 MAOR EASEMENT /MEDFORD STREET CHALESTOWN 1 / 28K062 LITTLE MYSTIC CHAEL

28K386 MAOR EASEMENT/TERMINAL STREET CHALES TOWN 1 / 28K385 LITTLE MYSTIC CHAEL NEPONSET RIVER VIA 10L094 MAJOR EASEMENT/GALLIVAN BOULEVAR DORCHESTER 74x93 DAVENPORT BROOK

10L096 MAOR HILLTOP AN LENOXDALE DORCHESTER NEPONSET RIVER STREETS PINE NECK CREEK STORM DRAIN 12L092 MAOR TENE STREET WEST OF DORCHESTER 2 / 12L294 NEPONSET RIVER LAWLEY

16L097 MAOR EASEMENT/OFF SAVIN HILL DORCHESTER PATTEN'S COVE AVENUE

20L081 MINOR EAST FIRST STREET SOUTH BOSTON RESERVED CHEL

20L083 MINOR EAST FIRST STREET SOUT BOSTON RESERVED CHEL CLAFLIN STREET EXT . /EAST 21L077 MAOR STREET EXT, SOUT BOSTON 1 / NOT MAPPED RESERVED CHANEL

23L016 MINOR NORTHERN AVENUE SOUT BOSTON 2 - 15&16 BOSTON INNR HAOR

23L074 MINOR SUMER STREET BRIDGE SOUTH BOSTON FORT POINT CHAEL

23L075 MAOR CONGRESS STREET BRIDGE SOUT BOSTON FORT POINT CHAEL

2 3L14 0 MINOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HABOR

23L145 MINOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HABOR

23L164 MAOR CONGRESS STREET BRIDGE BOSTON PROPER 1 / 23L164 FORT POINT CHAEL IN CHAEL WALL

23L195 MAOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HABOR

23L196 MAOR NEW NORTHERN AVENUE BRIDGE SOUTH BOSTON FORT POINT CHAEL

23L202 MAJOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HARBOR

24LOS7 MINOR STATE STREET EXT, BOSTON PROPER 18xlB BOSTON INNER HABOR

24L233 MAOR ROWE'S WHARF/ATLAIC BOSTON PROPER BOSTON HARBOR AVENUE

25L058 MAJOR CHR I STO PHER COLUMBUS PARK ­ EOSTON PROPER BOSTON INNER HABOR WATERFRONT

25L144 MINOR CLARK STREET BOSTON PROPER BOSTON INNER HARBOR

26L055 MAJOR NEAR BATTERY WHARF BOSTON PROPER 24X24 BOSTON INNER HABOR

26L070 MAJOR HAOVER STREET EXT, BOSTON PROPER BOSTON INNER HABOR

26L84 MINOR LEWIS STREET EAST BOSTON BOSTON INNER HABOR

27L020 MAOR PIER NO. EAS EMENT - NAVY CHARLESTOWN 20&24 1 / 27K020­ BOSTON INNER HARBOR YARD LITTLE MYSTIC CHAEL 28L073 MINOR EASEMENT/4TH STREET NAVY CH.l\RLESTO',.N YARD

28L074/075/ MAJOR 16TH STREET/4TH AVENUE ­ CHALESTOWN LITTLE MYSTIC CHAEL 076 NAVY YAR LITTLE MYSTIC CHAEL 28L077 MINOR EASEMENT/4TH AVENUE - NAVY CHARLESTOWN YARD

I1M093 MAJOR NEPONSET AVENUE AT DORCHESTER NEPONSET RIVER NROTHWEST END OF NBPONSET AVENUE BRIDGE

12M091 MAJOR ERICSSON/WALNUT ST, NEPONSET /MATTAPAN NEPONSET RIVER HARBOR POINT PARK DORCHESTER BAY 1 7MO 3 3 MAJOR (RELOCATED MT, VERNON ST. DORCHESTER DRAIN)

21M005 MAJOR SUMER STREET SOUTH BOSTON RESERVED CHAEL . fT ACHMENT A BOS' l uN WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

29M032 MINOR CONDOR STREET EAST BOSTON CHELSEA RIVER

29M041 MAJOR EASEMENT /CONDOR STREET EAST BOSTON 36x30 CHELSEA RIVER

29M049 MINOR CONDR STREET EAST BOSTON CHELSEA RIVER

29N135 MAOR ADDISON STREET EAST BOSTON 30x30 CHELSEA RIVER

28N156 MINOR COLERIDGE STREET EXT, EAST BOSTON BOSTON HABOR BOSTON HABOR 290001 MAOR BENNINGTON STREET EAST BOSTON 1 / 290062 CONSTITUION BEACH

310004 MINOR EASEMENT/WALDEMA AVENUE EAST BOSTON CHELSEA RIVER BOSTON HABOR NER 28P001 MINOR EASEMENT . EAST BOSTON CONSTITUION BEACH

29P015 MINOR EASEMENT/BARES AVEB EAST BOSTON BELLB ISLB INLET

29P044 MINOR SHAWSHEEN STRBET BAST BOSTON BOSTON HABOR

30P062 MINOR PALERMO AVENU BXTBNSION EAT BOSTON WETLAS BELLE ISLB INLET, REVERE 3lP084 MINOR EASBMENT /BENNINGTON STRBET EAST BOSTON

Major

Minor 102

Total: 195

* Major outfall means : An outfall that discharges from a single pipe of 36" or larger in diameter or a non-circular pipe which is associated with drainage area of more than 50 acres; or an outfall that discharges from a single pipe of 12" or larger in diameter serving lands zoned for industrial activity or a non-circular pipe which is associated with drainage area of 2 acres or more. TTACHMENT A BOSTON WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

OUTFALL OUTFALL LOCATION NEIGHBORHOOD SIZE TIDE GATES RECEIVING WATER NUMBER TYPE (INCHES) NO, OF GATES NUMBER

08B066 MAJOR EASEMENT /VFW PARKWAY WEST ROXBURY CHARLES RIVER

08Bl22 MAJOR EASEMENT /NORTH OF SPRING WEST ROXBURY CHALES RIVER STREET

08B126 MINOR SPRING STREET EXTENDED WEST ROXBURY CHARLES RIVER COW ISLA POND/ CHARLES 09B049 MAJOR EASEMENT /RIVERMOOR STREET WEST ROXBURY RIVER COW ISLA POND / CHARLES lOBO 15 MAJOR EASEMENT/CHARLES PARK ROAD WEST ROXBURY RIVER llB123 MAJOR EASEMENT /EAST OF BAKER ST, WEST ROXBURY BROOK FARM BROOK EXT,

12BOI0 MINOR BAKER STREET WEST ROXBURY BROOK FARM BROOK

12B014 MINOR BAKER STREET WEST ROXBURY BROOK FARM BROOK

12B031 MINOR EASEMENT /BAKER STREET WEST ROXBURY BROOK FARM BROOK

12B033 MINOR EASEMENT/BAKER STREET WEST ROXBURY BROOK FAR BROOK

128124 MAJOR EASEMENT/LaGRAGE STREET WEST ROXBURY 120xl02 BROOK FARM BROOK

13B002 MINOR LaGRAGE STREET WEST ROXBURY UNAMED STREAM

13BOll MINOR LaGRAGE STREET WEST ROXBURY UNAMED STREAM

06CllO MAJOR EASEMENT /PLEASANALE ST, WEST ROXBURY NONE SHOWN EXT,

07C006 MAJOR EASEMENT/VFW PARKWAY/BELLE WEST ROXBURY 126x126 CHARLES RIVER AVENUE

08C318 MAJOR WEDGEMERE ROAD WEST ROXBURY NONE SHOWN

08C319 MINOR WEDGEMERE ROAD WEST ROXBURY UNAMED STREAM

14C009 MAJOR EASEMENT/WESTGATE ROAD WEST ROXBURY UNNAMED WETLANS

2lC212 MINOR EASEMENT /LAKE SHORE ROAD ALLSTON /BRIGHTON CHALERS POND

22C384 MAJOR EASEMENT /LAKE SHORE ROAD ALLSTON / BRIGHTON CHALERS POND

24Cl 74 MINOR EASEMENT /NEWTON STREET ALLSTON/BRIGHTON 9x20 CHARLES RIVER

24C031 MAJOR PARSONS STREET ALLSTON/BRIGHTON 60X60 CHARLES RIVER

06D057 MINOR CEDAR CREST CIRCLE WEST ROXBURY NEPONSET RIVER WETLANS / CHALES RIVER 06D083 MINOR MARGARETTA DRIVE WEST ROXBURY WETLANS / CHARLES RIVER 06D084 MINOR EASEMENT /MARGARETTA DRIVE WEST ROXBURY WETLAS / CHALES RIVER 06D085 MINOR GEORGETOWN DRIVE WEST ROXBURY WETLAS / CHARLES RIVER 06D086 MINOR GEORGETOWN DRIVE WEST ROXBURY WETLAS/CHARLES RIVER 06D09l MINOR GEORGETOWN DRIVE WEST ROXBURY WETLANS / CHALES RIVER 06D184 MINOR GEORGETOWN DRIVE WEST ROXBURY BROOK GROVE STREET 06D187 MAJOR EASEMENT/GROVE STREET WEST ROXBURY CEMETERY

13qon/078 MAJOR WEST ROXBURY PARKWAY /VFW WEST ROXBURY BUSSEY BROOK PARKWAY NORTH BEACON STREET, ABOUT MAJOR 1 / 24D032­ CHALES RIVER 24D032 800' EAST OF PARSONS STREET ALLSTON/BRIGHTON 119X130

24D150 MAJOR SOLDIERS FIELD PLACE ALLSTON/BRIGHTON CHALES RIVER ABOUT 390 NORTH OF 25D033 MAJOR INTERSECTION OF SOLDIERS ALLSTON/BRIGHTON CHARLES RIVER FIELD ROAD & WESTERN AVENUE SPRAGUE POND/NEPONSET 01E024 MAJOR EASEMENT /LAKES IDE HYDE PARK RIVER

03E185 MAJOR NORTON STREET HYDE PARK WETLANS/NEPONSET RIVER

03E186 MINOR RIVER STREET HYDE PARK MILL POND/MOTHER BROOK

03E207 MINOR RIVER STREET HYDE PARK MILL POND/MOTHER BROOK TT ACHMENT A BOSTON WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS 04E064 MINOR ALVARADO AVE ,/RIVER STREET HYDE PARK MILL POND/MOTHER BROOK BRIDGE

04E069 MAJOR KNIGHT STREET DAM HYDE PARK MOTHER BROOK

05E180 MINOR GEORGETOWN DRIVE HYDE PARK NONE SHOWN/CHARLES RIVER

05E181 MINOR GEORGETOWN DRIVE HYDE PARK NONE SHOWN/CHARLES RIVER UNNAMED STREAM/CHALES 05E182 MINOR DEDliA STREET HYDE PARK RIVER

05E183 MINOR GEORGETOWN PLACE/DEDHAM HYDE PARK UNAMED STREAM PARKWAY

08E031 MINOR TURTLE POND PARKWAY WEST ROXBURY TURTLE POND

08E033 MINOR TURTLE POND PARKWAY WEST ROXBURY UNKNOWN TUTLE POND

08E035 MINOR WASHINGTON STREET WEST ROXBURY TURTLE POND

09E229 MINOR GRAVI EW STREET WEST ROXBURY NONE SHOWN

09E243 MAJOR BLUE LEDGE TR, /EASEMENT WEST ROXBURY UNAMED STREAM

13E174 MINOR EASEMENT /VFW PARKWAY ROSLINDALE BUSSEY BROOK

13E175 MAJOR EASEMENT /VFW PARKWAY ROSLINDALE 108X86 BUSSEY BROOK

13E176 MAJOR EASEMENT/WELD STREET ROXBURY NONE SHOWN

25E037 MAJOR EASEMENT /TEl,FORD STREET ALLSTON/BRIGHTON CHALES RIVER EXTENDED

01F031 MAJOR EASEMENT /MILLSTONE ROAD HYDE PARK 48x24 NEPONSET RIVER NEPONSET RIVER 02F085 MINOR LAWTON STREET HYDE PARK RESERVATION

02F093 MAJOR EASEMENT/SIERRA ROAD HYDE PARK NEPONSET RIVER EASEMENT /WOLCOTT CT , /HYDE 02Fl20 MAJOR PARK AVE, EXT, HYDE PARK NEPONSET RIVER MOTHER BROOK/NEPONSET 04P016 MAJOR EASEMENT RIVER STREET HYDE PARK RIVER

04F1l8 MINOR MASON STREET EXT, HYDE PARK NEPONSET RIVER EASEMENr /HYDE PARK 04F1l9 MAJOR AVE, /RESERVATION RD, HYDE PARK NEPONSET RIVER MOTHER BROOK/NEPONSET 04F189 MAJOR RESERVATION ROAD HYDE PARK RIVER NONE SHOWN/NEPONSET RIVER 04Fl91 MINOR FARAAY STREET HYDE PARK

04F2 0 3 MINOR G LENWOOD AVE HYDE PARK NEPONSET RIVER

04F204 MAJOR TRUMAN HWY, /CHITTICK STREET HYDE PARK NEPONSET RIVER

05Fll 7 MAJOR EASEMENT/TRUMA HYDE PARK NEPONSET RIVER HWY ,/WILLIAMS AVE, MOTHER BROOK/NEPONSET 05F244 MINOR HYDE PARK AVENUE BRIDGE HYDE PARK RIVER MOTHER BROOK/NEPONSET 05F245 MINOR HYDE PARK AVENUE HYDE PARK RIVER EASEMENT /BUSINESS ST" NEAR MOTHER BROOK/NEPONSET 05F253 MAJOR BUS INESS TERRACE HYDE PARK 48x24 RIVER

05F254 MINOR DANA AVENUE HYDE PARK NEPONSET RIVER MOTHER BROOK/NEPONSET 05F265 MAJOR BEHIND L, MASON CO, HYDE PARK RIVER WETLAN - STONY BROOK 06F233 MINOR MOUNT ASH ROAD HYDE PARK UNK RESERVATION

12F322 MINOR EASEMENT/WALTER STREET ROSLINDALE NONE SHOWN

13F095 MINOR EASEMENT/BUSSEY STREET ROSLINDALE BUSSEY BROOK

14F181 MAJOR CENTER STREET EXTENS ION ROSLINDALE 38X86 GOLDSMITH BROOK

14F185 MINOR ALLANALE STREET ROSLINDALE BUSSEY BROOK

15F288 MAJOR ARNOLD ARBORETUM/MURRAY JAMICA PLAIN GOLDSMITH BROOK CIRCLE ARNOLD ARBORETU, 100 EAST 15F307 MAJOR OF ARBORWAY & SAINT JOSEPH JAMICA PLAIN 36X36 GOI DSMITH BROOK STREET

17F012 MINOR FRACIS PARKMA DRIVE JAMICA PLAIN JAMICA POND TT ACHMENT A BOSTON WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

26F038 MAJOR HARVARD STREET EXT, ALLSTON/BRIGHTON CHARLES RIVER

05G1l2 MAJOR EASEMENT /RR ROW/WATER ST, HYDE PARK NEPONSET RIVER EXT,

05G1l5 MINOR FAIRMOUN AVENUE BRIDGE HYDE PARK NEPONSET RIVER (NORTH BANK)

05G1l6 MINOR FAIRMOUNT AVE, BRIDGE HYDE PARK NEPONSET RIVER (SOUTH BANK)

05G1l6A MINOR WARREN AVENUE HYDE PARK NEPONSET RIVER

06GI08 MAJOR EASEMENT /WEST OF WOOD AVE, HYDE PARK NEPONSET RIVER EXT,

RIVER TERRACE EXT, NEAR 06GI09 MAJOR ROSA STREET HYDE PARK NEPONSET RIVER

06GllO MAJOR EASEMENT/WEST STREET EXT, HYDE PARK NEPONSET RIVER

06Glll MINOR EASEMENT /VOSE STREET EXT" HYDE PARK NEPONSET RIVER TRUM HWY,

06G165 MINOR TRUM HIGHWAY/METROPOLITAN HYDE PARK NEPONSET RIVER AVE ABOUT 30 FEET FROM 06G166 MAJOR GUARDRAIL NORTHERLY S IDE OF HYDE PARK 36x36 NEPONSET RIVER TRUM HIGHWAY NEAR MILTON LINE, llG318 MINOR CULVERT UNER WALK HILL ROSLINDALE CANTERBURY BROOK STREET llG319 MINOR CULVERT UNER WALK HILL ROSLINDALE CANTERBURY BROOK STREET llG344 MAJOR CULVERT UNER WALK HI LL ROSLINDALE 162X78 CANERBURY BROOK STREET

18G233 MINOR WILLOW POND ROAD JAMICA PLAIN MUDDY RIVER ROXBURY /MISS ION 19G043 MAOR HUNINGTON AVENUE HALL 4Sx45 MUDDY RIVER ROXBURY/MISSION 19G194 MINOR HUNTINGTON AVENUE HILL MUDDY RIVER ROXBURY /MISSION 19G199 MINOR JAMICA WAY HILL MUDDY RIVER ROXBURY /MISSION 20G161 MAJOR EASEMENT /BROOKLINE AVENUE HILL MUDDY RIVER ROXBURY /MISS ION 20G163 MINOR EASEMENT /RIVERWAY HILL MUDDY RIVER EASEMENT/MASS TUPIKE/WEST 23G132 MAJOR OF B, BRIDGE ALLSTON/BRIGHTON CHALES RIVER SOLDIER' S FIELD ROAD SOUTH 24G034 MAJOR OF CAMBRIDGE STREET ALLSTON /BRIGHTON 1 / 24G034­ CHALES RIVER

24G035 MAJOR SOLDIERS FIELD ROAD/BABCOCK ALLSTON/BRIGHTON 90x84 CHARLES RIVER STREET

25G005 MINOR FROM WESTERN AVENUE BRIDGE ALLSTON/BRIGHTON CHARLES RIVER SOLDIERS FIELD ROAD/NORTH 25G041 MINOR OF WESTERN AVENUE BRIDGE ALLSTON/BRIGHTON CHARLES RIVER

06HI06 MINOR OSCEOLA STREET HYDE PARK NEPONSET RIVER

06HI07 MAJOR EASEMENT /BELNEL ROAD HYDE PARK NEPONSET RIVER EASEMENT /EDGEWATER/ SOUTH 07HI05 MAJOR RIVER STREET NEPONSET /MATTAPAN l02x72 NEPONSET RIVER

07H285 MAJOR BLUE HILL AVENUE NEPONSET /MATTAPAN 106x63 NEPONSET RIVER

07H287 MINOR RIVER STREET /EDGEWATER NEPONSET/MATTAPAN NEPONSET RIVER DRIVE

07H346 MINOR EDGEWATER DRIVE/HOLMFIELD HYDE PARK NEPONSET RIVER AVENUE

07H347 MI NOR EDGEWATER DRIVE/BURH ROAD NEPONSET /MATTAPAN NEPONSET RIVER

07H348 MINOR EDGE WATER DRIVE/TOPALIAN NEPONSET/MATTAPAN NEPONSET RIVER STREET

12H085 MINOR MORTON STREET ROSLINDALE CANTERBURY BROOK

MAJOR AMERICAN LEGION HIGHWAY WEST ROXBURY CANTERBURY BROOK

21H047 MINOR PALACE ROAD EXT, BOSTON PROPER MUDDY RIVER TTACHMENT A BOSTON WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

21H048 MINOR EASEMENT /FENWAY /EVANS WAY BOSTON PROPER MUDY RIVER

21H201 MINOR PALACE ROAD EXT, BOSTON PROPER MUDY RIVER

23H040 MINOR RALEIGH STREET EXT, BOSTON PROPER CHARLES RIVER

23H042 MAJOR DEERFIELD STREET BOSTON PROPER 116x120 CHARLES RIVER

081153 MINOR DUXBURY ROAD NEPONSET /MATTAPAN NEPONSET RIVER

081154 MINOR EASEMENT /RIVER NEPONSET /MATTAPAN NEPONSET RIVER STREET/GLADS IDE AVE

NEPONSET RIVER 081155 MINOR EASEMENT/RIVER NEPONSET /MATTAPAN STREET/MAELON CIR

081156 MINOR EASEMENT/RIVER NEPONSET/MATTAPAN NEPONSET RIVER STREET /MAMELON CIR

081158 MINOR EASEMENT/RIVER NEPONSET /MATTAPAN NEPONSET RIVER STREET /FREMONT ST,

081207 MINOR MEADOWBANK AVENUE EXT, NEPONSET /MATTAPAN NEPONSET RIVER

081209 MINOR MEADOWBANK AVENUE EXT, NEPONSET /MATTAPAN NEPONSET RIVER

111577 MAJOR HARVARD STREET NEPONSET /MATTAPAN l02xl02 CANERBURY BROOK

08J041 MINOR RIVER STREET DORCHESTER NEPONSET RIVER

08JI02 MINOR ADAMS STREET DORCHESTER 15x15 NEPONSET RIVER

08JI03 MAJOR EASEMENT/CENTRAL AVENUE DORCHESTER NEPONSET RIVER BRIDGE

08J49/50 MAJOR DESMOND ROAD DORCHESTER 2-18&24 NEPONSET RIVER

26J052 MINOR MONSIGNOR 0' BRIBN HIGHWAY BOSTON PROPER CHARLES RIVER

26J055 MINOR LEVERETT CIRCLE BOSTON PROPER 1 / NOT MAPPED CHARLES RIVER

27JOOI MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN MILLERS RIVER

27J044 MAJOR PRISON POINT BRIDGE CHALESTOWN MILLERS RIVER

27J096 MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN MILLERS RIVER

29J029 MINOR ALFORD STREET/RYAN PLGD, CHARLES TOWN MYSTIC RIVER EXT,

29J129 MINOR ALFORD STREET CHALESTOWN MYSTIC RIVER EASEMENT /MEDFORD STREET 29J212 MAJOR (ALSO OF017) CHARLESTOWN MYSTIC RIVER

30J006 MAJOR EASEMENT/ALFORD STREET CHARLESTOWN MYSTIC RIVER

30J019 MAJOR ALFORD STREET CHARLESTOWN MYSTIC RIVER

30J030 MAJOR EASEMENT /ARLINGTON AVENUE CHARLESTOWN 1 / NOT MAPPED MYSTIC RIVER

08K049 MINOR BEARSE AVENUE DORCHESTER NEPONSET RIVER

09K016 MINOR EASEMENT/BEARSE AVENUE EXT, DORCHESTER NEPONSET RIVER

09KI00 MAJOR EASEMENT/MELLISH ROAD DORCHESTER 34X24 NEPONSET RIVER

09KI0l MINOR EASEMENT/HUNTOON STREET DORCHESTER NEPONSET RIVER EXT,

21K069 MAOR EAST BERKELEY STREET BOSTON PROPER 1 / 21K069­ FORT POINT CHAEL

26K099 MAJOR CHELSEA STREET EXT, CHALESTOWN CHARLES RIVER fT ACHMENT A BOSTON WATER AND SEWER COMMISSION STORMW A TER OUTF ALLS

26K245 MINOR EASEMENT CHARLESTOWN CHARLES RIVER

28K018 MAJOR OLD LANING WAY EXT, CHALESTOWN 1 / 28K05B LITTLE MYSTIC CHAEL

28K061 MAJOR EASEMENT/MEDFORD STREET CHALESTm;N 1 / 28K062 LITTLE MYSTIC CHAEL

28K386 MAJOR EASEMENT /TERMINAL STREET CHARLESTOWN 1 / 28K385 LITTLE MYSTIC CHAEL NEPONSET RIVER VIA 10L094 MAJOR EASEMENT /GALLIVAN BOULEVAR DORCHESTER 74x93 DAVENPORT BROOK

10L096 MAJOR HILLTOP AN LENOXDALE DORCHESTER NEPONSET RIVER STREETS PINE NECK CREEK STORM DRAIN 12L092 MAJOR TENEAN STREET WEST OF DORCHESTER 2 / 12L294 NEPONSET RIVER LAWLEY

16L097 MAJOR EASEMENT/OFF SAVIN HILL DORCHESTER PATTEN'S COVE A VENUE

20L081 MINOR EAST FIRST STREET SOUTH BOSTON RESERVED CHANEL

20L083 MINOR EAST FIRST STREET SOUTH BOSTON RESERVED CHANEL CLAFLIN STREET EXT , /EAST 21L077 MAJOR STREET EXT, SOUTH BOSTON 1 / NOT MAPPED RESERVED CHAEL

23L016 MINOR NORTHERN AVENUE SOUTH BOSTON 2.15&16 BOSTON INNER HARBOR

23L074 MINOR SUMMER STREET BRIDGE SOUTH BOSTON FORT POINT CHANEL

23L075 MAJOR CONGRESS STREET BRIDGE SOUTH BOSTON FORT POINT CHANEL

23L140 MINOR NORTHERN II VENUE SOUTH BOSTON BOSTON INNER HARBOR

23L145 MINOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HABOR

23L164 MAJOR CONGRESS STREET BRIDGE BOSTON PROPER 1 / 23L164 FORT POINT CHAEL IN CHAEL WALL

23L195 MAJOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HARBOR

23L196 MAJOR NEW NORTHERN AVENUE BRIDGE SOUTH BOSTON FORT POINT CHAEL

23L202 MAJOR NORTHERN AVENUE SOUTH BOSTON BOSTON INNER HABOR

24L057 MINOR STATE STREET EXT, BOSTON PROPER 18x18 BOSTON INNER HARBOR

24L233 MAJOR ROWE I S WHARF/ATLANIC BOSTON PROPER BOSTON HARBOR AVENUE

25L058 MAJOR CHRI STOPHER COLUMBUS PARK ­ BOSTON PROPER BOSTON INNER HABOR WATERFRONT

25L144 MINOR CLARK STREET BOSTON PROPER BOSTON INNER HARBOR

26L05S MAJOR NEAR BATTERY WHARF BOSTON PROPER 24X24 BOSTON INNER HABOR

26L070 MAJOR HAOVER STREET EXT. BOSTON PROPER BOSTON INNER HARBOR

26L84 MINOR LEWIS STREET EAST BOSTON BOSTON INNER HABOR

27L020 MAJOR PIER NO, 4 EASEMENT - NAVY CHARLES TOWN 20&24 1 / 27K020­ BOSTON INNER HARBOR YARD LITTLE MYSTIC CHAEL 28L073 MINOR EASEMENT/4TH STREET - NAVY CHARLESTOWN YAR

28L074/07S/ MAJOR 16TH STREET/4TH AVENUE ­ CHALESTOWN LITTLE MYSTIC CHAEL 076 NAVY YARD LITTLE MYSTIC CHAEL 28L077 MINOR EASEMENT/4TH AVENUE - NAVY CHARLESTOWN YARD

llM093 MAJOR NEPONSET AVENUE AT DORCHESTER NEPONSET RIVER NROTHWEST END OF NEPONSET AVENUE BRIDGE

12M091 MAJOR ERICSSON/WALNU ST, NEPONSET /MATTAPAN NEPONSET RIVER HARBOR POINT PARK 17M033 MAJOR (RELOCATED MT, VERNON ST, DORCHESTER DORCHESTER BAY DRAIN)

21MOOS MAJOR SUMMER STREET SOUTH BOSTON RESERVED CHAEL . fT ACHMENT A BOSTON WATER AND SEWER COMMISSION

STORMWATER OUT FALLS

29M032 MINOR CONDOR STREET EAST BOSTON CHELSEA RIVER

29M041 MAJOR EASEMENT / CONDOR STREET EAST BOSTON 36x30 CHELSEA RIVER

29M049 MINOR CONDOR STREET EAST BOSTON CHELSEA RIVER

29N135 MAJOR ADDISON STREET EAST BOSTON 30x30 CHELSEA RIVER

2BN156 MINOR COLERIDGE STREET EXT, EAST BOSTON BOSTON HABOR BOSTON HARBOR NEAR 290001 MAJOR BENNINGTON STREET EAST BOSTON 1 / 290062 CONSTITUION BEACH

310004 MINOR EASEMENT jWALDEMAR AVENUE EAST BOSTON CHELSEA RIVER BOSTON HABOR NEAR 28POOI MINOR EASEMENT EAST BOSTON CONSTITUTION BEACH

29P015 MINOR EASEMENT /BARES AVENUE EAST BOSTON BELLE ISLE INLET

29P044 MINOR SRAWSHEEN STREET EAST BOSTON BOSTON HABOR

30P062 MINOR PALERMO AVENUE EXTENSION EAST BOSTON WETLAS BELLE ISLE INLET REVERE 3lPO 84 MINOR EASEMENT /BENNINGTON STREET EAST BOSTON

Major

Minor 102

Total: 195

* Major outfall means : An outfall that discharges from a single pipe of 36" or larger in diameter or a non-circular pipe which is associated with drainage area of more than 50 acres; or an outfall that discharges from a single pipe of 12" or larger in diameter serving lands zoned for industrial activity or a non-circular pipe which is associated with drainage area of 2 acres or more. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION I JOHN F. KENNEDY FEDERAL BUILDING BOSTON , MASSACHUSETTS 02203 FACT SHEET

DRAFT NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT TO DISCHARGE TO WATERS OF THE UNITED STATES.

NPDES PERMIT NO. : MAS010001 NAME AND ADDRESS OF APPLICANT: Boston Water and Sewer Commission 425 Sumer Street Boston, Massachusetts 02210

NAME AND ADDRESS OF FACILITIES WHERE DISCHARGES OCCUR:

195 Storm water Outfalls listed in Permit Attachment A

RECEIVING WATERS: Belle Isle Inlet, Boston Harbor, Boston Inner Harbor, Brook Farm Brook, Bussey Brook, Canterbury Brook, Chandler Pond, Charles River, Chelsea River, Dorchester Bay, Fort Point Channel, Goldsmith Brook, Jamaica Pond, Little Mystic Channel, Mill Pond, Millers River, Mother Brook, Muddy River, Mystic River, Neponset River, Old Harbor, Patten1 Cove, Reserved Channel, Sprague Pond, Stony Brook, Turtle Pond, and unnamed wetlands, brooks and streams

CLASSIFICATION: Class SB and B

Io Proposed Action, Type of Facility and Discharge Locationo

The Boston Water and Sewer Commission (BWSC), the permittee, is empowered to promulgate rules and regulations regarding the use of its common sewers, including its sanitary sewers, combined sewers and storm drains. BWSC applied for its Municipal Separate Storm 'Sewer System (MS4) permit, which will discharge storm water from 195 identified separate storm sewer outfalls to receiving waters listed in Attachment , A. lo Discharge Characteristics

At the time of this draft, BWSC operates 195 identified separate storm sewer out falls. Locations, size, and receiving waters for these outfalls are identified in Attachment A. Storm water discharge sampling results from five representative outfalls are shown on Table 3- 21 of the permit application (Part II) dated May 17, 1993 and are included as Attachment B. A discussion of the application.results of sampling can be found in Part II Chapter 3 of the

20 Limitations and Conditions.

Permit conditions and all other requirements described herein may be found in Part I of the draft permit. No numeric effluent limitations have been established for this draft permit.

30 Permit Basis and Explanation of Permit Conditions As authorized by Section 402 (p) of the Act , this permit is being proposed on a system-wide basis. This permit covers all areas under the jurisdiction of BWSC or otherwise contributing to discharges from municipal separate storm sewers owned or operated by the permittee.

a. Statutory basis for permit conditions. The conditions established by this permit are based on Section 402 (p) (3) (B) of the Act which mandates that a permit for discharges from MS4s must: effectively prohibit the discharge of non-storm water to the MS4 and require controls to reduce pollutants in discharges from the MS4 to the maximum extent practicable including best management practices, control techniques, and system design and engineering methods, and such other provisions determined to be appropriate. MS4s are required to achieve compliance with Water Quality Standards. Section 301(b) (1) (C) of the Act, requires that NPDES permits include limitations, including those necessary to meet water quality standards. The intent of the permit conditions is to meet the statutory mandate of the Act.

EPA has determined that under the provisions of 40 CFR 122. 44 (k) the permit will include Best Management Practices (BMPs). A comprehensive Storm Water Management Program (SWMP) includes BMPs to demonstrate compliance with the maximum extent practicable standard. Section 402(p) (3) (B) (iii) of the Act clearly includes structural controls as a component of the maximum extent practicable requirement as necessary to achieve compliance with Water Quality Standards. EPA encourages the permittee to explore opportunities for pollution prevention measures, while reserving the more costly structural controls for higher priority watersheds, or where pollution prevention measures prove unfeasible or ineffective in achieving water quality goals and standards. b. Requlatorv basis for permit conditions. As a result of the statutory requirements of the Act the EPA promulgated the MS4 Permit application regulations, 40 CFR 122. 26 (d). These regulations describe in detail the permi t application requirements for operators of MS4s. The information in the application (Parts 1 and 2) and supplemental information provided in June 1995 and June 1998 was used to develop the draft permit conditions.

Discharges Authorized By This Permit

a. Storm water. This permit authorizes all existing or new storm water point source discharges to waters of the United States from the MS4.

b. Non-storm water. This permit authorizes the discharge of storm water commingled with flows contributed by wastewater or Storm Water Associated with Industrial Activity, provided such discharges are authorized by separate NPDES permits and in compliance with the permittee I s regulations regarding the use of storm drains. Nothing in this draft permit conveys a right to discharge to the permittee' s system without the permittee I s authorization. In addition , certain types of non- storm waters identified in the draft permit at Part I. B. 2. g. are authorized if appropriately addressed in the permittee s Storm Water Management Program. The following demonstrates the difference between the Act' statutory requirements for discharges from municipal storm sewers and industrial sites: i. Section 402 (p) (3) (B) of the Act requires an effective prohibition on non- storm water discharges to a MS4 and controls to reduce the discharge of pollutants from the MS4 to the Maximum Extent Practicable (MEP). ii. Section 402 (p) (3) (A) of the Act requires compliance with treatment technology (BAT/BCT) and Section 301 water quality requirements on discharges of Storm Water Associated with Industrial Activity. The Act requires Storm Water Associated with Industrial Activity discharging to the MS4 to be covered by a separate NPDES permit. However, the permittee is responsible for the quality of the ultimate discharge, and has a vested interest in locating uncontrolled and unpermitted discharges to the system.

c. Spills. This permit does not authorize discharges of material resulting from a spill. If discharges from a spil; are unavoidable to prevent imminent threat to human life, personal injury, or severe property damage, the permittee has the responsibility to take (or insure the party responsible for the spill takes) reasonable and prudent measures to minimize the impact of discharges on human heal th and the environment. Receiving Stream Segments and Discharge Locations The permittee discharges to the receiving waters listed in Attachment A, which are classified according to the Massachusetts Surface Water Quality Standards as Class B, B o, SB, and SB water bodies. Despite variance conditions and CSO designation storm water discharges shall achieve compliance with Class B and SB standards. Class B and SB waters shall be of such quality that they are suitable for the designated uses of protection and propagation of fish, other aquatic life and wildlife and for primary and secondary contact recreation. Notwithstanding specific conditions of this permit, the discharges must not lower the quality of any classified water body below such classification , or lower the existing quality of any water body if the existing quality is higher than the classification except in accordance with Massachusetts' Antidegradation Statutes and Regulations.

6 0 SWMP 0 The following prohibitions apply to discharges from MS4s and were considered in review of the current management programs which the permittee is operating. In implementing the SWMP, the permittee is required to select measures or acti vi ties intended to achieve the following prohibitions.

No discharqe of toxics in toxic amounts The discharge of toxics in toxic amounts is prohibited (Section 101 (a) (3) of the Act) ... . . "

No discharqe of pollutants in quantities that would cause a violation of State water quality standards. Section 301 (b) (1) (C) of the Act and 40 CFR 122. 44 (d) require that NPDES permits include any more stringent limitations, including those necessary to meet water quality standards, treatment standards, or schedule of compliance, established pursuant to State law or regulations. Implementation of the SWMP is reasonably expected to provide for protection of State water quality standards. No discharqe of non- storm water from the municipal separate storm sewer system, except in accordance with Part II. B. 2. Permits issued to MS4s are specifically required by Section 402 (p) (3) (B) of the Act to " ... include a requirement to effectively prohibit non-storm water discharges into the storm sewers... The regulations (40 CFR 122. 26(d) (2) (iv) (B) (1)) allow the permittee to accept certain non-storm water discharges where they have not been identified as significant sources of pollutants. Any discharge allowed by the permittee and authorized by a separate NPDES permit is not subject to the prohibition on non- storm water discharges. No numeric effluent limitations are proposed in the draft permit. In accordance with 40 CFR ~122. 44 (k), the EPA has required a series of Best Management Practices, in the form of a comprehensive SWMP , in lieu of numeric limitations.

Storm Water Management Program BWSC provided updates to its SWMP in June 1995 and June 1998. The current SWMP addresses all required elements. Some of the elements of the SWMP are wholly or in part the responsibility of the City of Boston rather than BWSC. The permit requires the permittee to cooperate with appropriate municipal agencies to assure that the goals of the SWMP are achieved by building upon existing programs and procedures which address activities impacting storm water discharges to the MS4. EPA has requested permit application information from the City of Boston. This information will be used to develop permit conditions for the City to implement the SWMP measures which are under its control. This will be effected through a permit modification identifying the City as a co- permittee and specifying its responsibilities or through the issuance of a separate permit to the City. Table A identifies the required elements of the SWMP , the regulatory cite, and the relevant draft permit condition.

Table A - Storm Water Management Program Elements Structural Controls I.B. (d) (2) (iv) (A) (1) Areas of new development & I.B. (d) (2) (iv) (A) (2) significant redevelopment Roadways I.B. (d) (2) (iv) (A) (3) Flood Control proj ects I.B. (d) (2) (iv) (A) (4) Pesticides, Herbicides, & I.B. (d) (2) (iv) (A) (6) Fertilizers Application Illicit Discharges and I.B. (d) (2) (iv) (B) (1) - (3), Improper Disposal (iv) (B) (7) Spill Prevention and Response I.B. (d) (2) (iv) (B) (4) Industrial and High Risk I . 2. i (d) (2) (iv) (C), (iv) (A) (5) Runoff Construction Site Runoff I.B. (d) (2) (iv) (D) Public Education I.B. (d) (2) (iv) (A) (6), (iv) (B) (5), (iv) (B) (6) Moni toring Program I.C (d) (2) (iv) (B) (2), (iii), (iv) (A), (iv) (C) (2)

Attachment C provides a discussion of the permit condition and the permittee I s existing SWMP.

80 Legal Authority. BWSC has demonstrated its authority to promulgate regulations regarding the use of its common sewers, including its sanitary sewers, combined sewers and storm drains. Regulations Governinq the Use of Sanitary and Combined Sewers and Storm Drains of the Boston Water and Sewer Commission were adopted January 15, 1998 and effective February 27 , 1998. 90 Resources Part I. B . 6 of the permit requires the permittee to provide adequate support capabilities to implement its acti vi ties under the SWMP. Compliance with this requirement will be demonstrated by the permittee I s ability to fully implement the SWMP , monitoring programs , and other permit requirements. The permit does not require specific funding or staffing levels, thus providing the permittee with the ability, and incentive, to adopt the most efficient and cost effective methods to comply with the permit requirements. The draft permit also requires an Annual Report (Part I. E. ) which includes an evaluation of resources to implement the plan. 100 Moni toring and Reporting

a. Monitorinq. The BWSC sampled five locations which were selected to provide representative data on the quality and quantity of discharges from the MS4 as a whole. Parameters sampled included conventional, non-conventional, organic toxics , and other toxic pollutants. The EPA reviewed this information during the permitting process. Monitoring data is intended to be used by the BWSC to assist in its determination of appropriate storm water management practices. EPA used the data to identify the minimum parameters for sampling under Part I. C of the permit.

The BWSC is required (40 CFR ~122 . 26 (d) ((2) (iii) (C) and (D)) to monitor the MS4 to provide data necessary to assess the effecti veness and adequacy of SWMP control measures estimate annual cumulative pollutant loadings from the MS4 estimate event mean concentrations and seasonal pollutants in discharges from maj or outfalls identify and prioritize portions of the MS4 requiring additional controls, and identify water quality improvements or degradation. The BWSC is responsible for conducting any additional monitoring necessary to accurately characterize the quality and quantity of pollutants discharged from the MS4.

EPA will make future permitting decisions based on the monitoring data collected during the permit term and available water quality information. Where the required permit term monitoring proves insufficient to show pollutant reductions, the EPA may require more stringent Best Management Practices , or where necessary to protect water quality, establish numeric effluent limitations. 1 . Representative moni torinq: The monitoring of the discharge of representative outfalls during actual storm events will provide information on the quality of runoff from the MS4 , a basis for estimating annual pollutant loadings, and a mechanism to evaluate reductions in pollutants discharged from the MS4. Results from the monitoring program will be submitted annually with the annual report.

2. Requirements: The BWSC shall monitor representative discharges to characterize the quality of storm water discharges from the MS4. Within 90 days after the effective date of this permit, the BWSC will submit its proposed sampling plan. The BWSC shall choose five locations representing the different land uses or drainage areas representative of the system, with a focus on what it considers priority areas, such as an outfall in the vicinity of a public beach or a shellfish bed. This submittal shall also include any related monitoring which the BWSC has done since its MS4 permit application was submitted. Unless commented on or denied by the Director within 60 days after its submittal , the proposed sampling plan shall be' deemed approved.

3. Parameters: The EPA established minimum permit parameter monitoring requirements based on the information available regarding storm water discharges and potential impacts of these discharges. The basic parameter list allows satisfaction of the regulatory requirement (40 CFR ~122. 26 (d) (2) (iii) J to provide estimates of pollutant loadings for each maj or outfall.

4. Frequencv: The frequency of annual monitoring is based on monitoring at least one representative storm event three times a year. The plan should consider sampling events in the spring, summer, and fall (excluding January to March). Monitoring frequency is based on permit year, not a calendar year. The first complete calendar year monitoring could be less than the stated frequency.

5. Recei vinq Water Ouali tv Moni torinq : The draft permit is conditioned to include four sampling stations to assess the impact of storm water discharges from the MS4 to receiving waters. The permittee shall submit a plan to sample four locations three times a year for the permit term within 90 days of the effective date of the permit. The minimum parameters for analysis are consistent with the representative monitoring requirements. b. Screeninq. The draft permit requires two screening programs. Part I. C. 6 requires the permittee to develop a Wet Weather Screening Program. This screening shall record physical observations of wet weather flows from all major outfalls at least once during the permit term. The program will identify discharges which may be contributing to water quality impairments short of analytical monitoring. Part I. D. requires a dry weather screening program. c. Reportinq. The permittee is required (40 CFR ~122. 42 (c) (1)) to contribute to the preparation of an annual system- wide report including the status of implementing the SWMP; proposed changes to the SWMP; revisions, if necessary, to the assessments of controls and the fiscal analysis reported in the permit application; a summary of the data, including monitoring data, that is accumulated throughout the reporting year; annual expenditures and the budget for the year following each annual report; a summary describing the number and nature of enforcement actions, inspections, and public education programs; and identification of water quality improvements or degradation. Part I. E. of the draft permit requires the permittee to do annual evaluations on the effectiveness of the SWMP , and institute or propose modifications necessary to meet the overall permit standard of reducing the discharge of pollutants to the maximum extent practicable. In order to allow the orderly collection of budgetary and monitoring data it was determined to establish the annual report due date relative to the permittee I s annual fiscal year. BWSC I s fiscal year

ends on December 31 and the annual report is due on March 1 each year commencing March 1 , 1999.

110 Permit Modifications a. Reopener Clause. The EPA may reopen and require modifications to the permit (including the SWMP) based on the following factors: changes in the State I s Water Quality Management Plan and State or Federal requirements; adding co- permittee (s); SWMP changes impacting compliance with permit requirements; other modifications deemed necessary by the EPA to adhere to the requirements of the Clean Water Act. Co- permittees may be incorporated into this permit or separate permits may be required as necessary to achieve the goals of the SWMP. Implementation of the SWMP is expected to result in the protection of water quality. The draft permit contains a reopener clause should new information indicate that the discharges from the MS4 are causing, or are significantly contributing to, a violation of the State s water quality standards. b. SWMP Chanqes. The SWMP is intended to be a tool to achieve the maximum extent practicable and water quality standards. Therefore, minor changes and adj ustments to the various SWMP elements are expected and encouraged where necessary. Changes may be necessary to more successfully adhere to the goals of the permit. Part I. B. 7 . c of the draft permit describes the allowable procedure for the permittee to make changes to the SWMP. Any changes requested by a permittee shall be reviewed by the EPA and DEP. The EPA and DEP have 60 days to respond to the permittee and inform the permittee if the suggested changes will impact or change the SWMP I S compliance with a permit requirement.

c. Additions. The EPA intends to allow the permittee to annex lands, activate new out falls, deactivate existing outfalls, and accept the transfer of operational authority over portions of the MS4 without mandating a permit modification. Implementation of appropriate SWMP elements for these additions (annexed land or transferred authority) is required. Upon notification of the additions in the Annual Report, the EPA shall review the information to determine if a modification to the permit is necessary based on changed circumstances.

The remaining conditions of the permit are based on the NPDES regulations, 40 CFR Parts 122 though 125 , and consist primarily of management requirements common to all permits.

IIo State Certification Requirements EPA may not issue a permit unless the State Water Pollution Control Agency with jurisdiction over the receiving waters certifies that the effluent limitations contained in the permit are stringent enough to assure that the discharge will not cause the receiving water to violate State Water Quality Standards. The staff of the Massachusetts Department of Environmental Protection has reviewed the draft permit and advised EPA that the limitations are adequate to protect water quality. EPA has requested permit certification by the State and expects that the draft permit will be certif ied. IIIo Comment Period, Hearing Requests and Procedures for Final Decisions All persons, including applicants , who believe any condition of the draft permit is inappropriate must raise all issues and submit all available arguments and all supporting material for their arguments in full by the close of the ' public comment period, to the U. S. EPA , Planning and Administration (SPA), P. Box 8127 , Boston , MA 02114. Any person , prior to such date, may, submit a request in writing for a public hearing to consider the draft permit to EPA and the State Agency. Such requests shall state the nature of the issues proposed to be raised in the hearing. A public hearing may be held after at least thirty days public notice whenever the Regional Administrator finds that response to this notice indicates significant public interest. In reaching a final decision on the draft permit the Regional Administrator will respond to all significant comments and make those responses available to the public at EPA' s Boston Office. Following the close of the comment period, and after a public hearing, if such hearing is held , the Regional Administrator will issue a final permit decision and forward a copy of the final decision to the applicant and to each person who has submitted written comments or requested notice. Within 30 days following the notice of the final permit decision any interested person any submit a request for a formal hearing to reconsider or contest the final decision. Requests for formal hearings must satisfy the requirements of 40 CFR ~124. , 48 Fed. Reg. 14279- 14280 (April 1 , 1983).

IV EPA Contact Additional information concerning the draft permit may be obtained between the hours of 9:00 a. m. and 5:00 p. m., Monday through Friday, excluding holidays from: Jay Brolin U. S. Environmental Protection Agency John F. Kennedy Federal Building Office of Ecosystem Protection (CMA) Boston, MA 02203- 0001 Telephone: (617) 565- 9453 Fax: (617) 565- 4940 r;fI4%' eX Linda M. Murphy, Director Date Office of Ecosystem Protection u. S. Environmental Protection Agency Attachment C

Structural Controls: The permittee shall operate the separate storm sewer system and any storm water structural controls in a manner to reduce the discharge of pollutants to the Maximum Extent Practicable. The permittee I s existing SWMP includes operation and maintenance procedures to include an inspection schedule of storm water structural controls adequate to satisfy the permit condition.

Areas of New Development and Significant Redevelopment: The permittee has no authority over land use issues. The draft permit is conditioned to require the permittee to coordinate with the appropriate municipal agencies as it relates to discharges to the MS4. The permittee has its own site plan review process relating to new or modified connections for water , sewer, and drains and has the authority to require controls on discharges to the storm drain system during and after construction.

Roadways: The permittee has no authority to ensure that public streets, roads, and highways are operated and maintained in a manner to minimize discharge of pollutants, including those pollutants related to deicing or sanding activities. The draft permit is conditioned to require the permittee to coordinate with appropriate municipal agencies as it relates to discharge to the MS4.

Pesticide, Herbicide, and Fertilizer Application: The permittee shall coordinate with appropriate municipal agencies to evaluate existing measures to reduce the discharge of pollutants related to the storage and application of pesticides, herbicides, and fertilizers applied to public property.

Non- Storm Water discharges: Non-storm water discharges shall be effectively prohibited. However, the permittee may allow certain non- storm water discharges as listed in 122. 26 (d) (2) (i v) (B) (1) and Part I. 2 of the draft permit. The permittee has identified allowable non-storm water discharges in its regulations. The permittee shall implement controls to prevent discharges of dry and wet weather overflows from sanitary sewers into the MS4. The permittee shall also control the infiltration of seepage from sanitary sewers into the MS4. This is presently accomplished through the permittee' s illicit connection program and it' Inflow/Infiltration program.

The discharge or disposal of used motor vehicle fluids, household hazardous wastes, grass clippings, leaf litter , and animal wastes into the MS4 is prohibited in accordance with the permittee regulations. The permittee shall coordinate with appropriate regulations. The permittee shall coordinate with appropriate public and private agencies to ensure continued implementation of programs to collect used motor vehicle fluids (at a minimum, oil and antifreeze) for recycle, reuse, or proper disposal and to collect household hazardous waste materials (including paint, solvents, pesticides, herbicides , and other hazardous materials) for recycle, reuse, or proper disposal. The City of Boston has an existing program.

Illici t Discharges and Improper Disposal: The BWSC shall continue to implement its program to locate and eliminate illicit discharges and improper disposal into the MS4. This program shall include dry weather screening activities to locate portiQns of the MS4 with suspected illicit discharges and improper disposal. Follow-up activities to eliminate illicit discharges and improper disposal may be prioritized on the basis of magni tude and nature of the suspected discharge; sensi ti vi ty of the receiving water; and/or other relevant factors. This program shall establish priorities and schedules for screening the entire MS4 at least once every five years. At present the permittee has on- going programs in Brighton (BOS 032) discharges to the Charles River , discharges to Brookline' s Village and Tannery Brook drainage systems, and discharges through Dedham to Mother Brook. Facility inspections may be carried out in conjunction with other programs (e. g. pretreatment inspections of industrial users, health inspections, fire inspections, etc. The BWSC shall eliminate illicit discharges as expeditiously as possible and require the immediate termination of improper disposal practices upon identification of responsible parties. Where elimination of an illicit discharge wi thin sixty (60) days is not possible, the BWSC shall establish an expeditious schedule for removal of the discharge. In the interim , the BWSC shall take all reasonable and prudent measures to minimize the discharge of pollutants to the MS4.

Spill Prevention and Response: The permittee shall coordinate with appropriate municipal agencies to implement a program to prevent, contain, and respond to spills that may discharge into the MS4. The existing spill response program in the City includes a combination of spill response actions by the permittee, municipal agencies and private entities. The permittee s regulations include legal requirements for public and private entities within the permittee s jurisdiction.

Industrial & High Risk Runoff: The permittee shall coordinate with EPA and DEP to develop a program to identify and control pollutants in storm water discharges to the MS4 from municipal landfills; other treatment, storage, or disposal facilities for municipal waste (e. g. transfer stations, incinerators, etc. , '

hazardous waste treatment, storage, disposal and recovery facilities and facilities that are subj ect to EPCRA Title III, Section 313; and any other industrial or commercial discharge which the permittee determine is contributing a substantial pollutant loading to the MS4 shall be implemented. The program shall include inspections, a monitoring program and a list of industrial storm water sources discharging to the MS4 which shall be maintained and updated as necessary. This requirement is not meant to cover all such discharges, but is intended to priori tiz those discharges from this group which are believed to be contributing pollutants to the MS4 and to identify those dischargers which may require NPDES permit coverage or are not in compliance with existing permits.

Construction Site Runoff: The permittee shall coordinate with appropriate municipal agencies to implement a program to reduce the discharge of pollutants from construction sites to the separate storm sewer. This program shall include: requirements for the use and maintenance of appropriate structural and non- structural control measures to reduce pollutants discharged to the MS4 from construction sites; inspection of construction sites and enforcement of control measure requirements required by the permi t tee; appropriate education and training measures for construction site operators; and notification of appropriate building permit applicants of their potential responsibilities under the NPDES permitting program for construction site runoff and any post- construction permitting.

Public Education: The permittee shall coordinate with appropriate municipal agencies to implement a public education program with the following elements: (a) a program to promote, publicize, and facili tate public reporting of the presence of illicit discharges or improper disposal of materials into the MS4; (b) a program to promote, publicize, and facilitate the proper management and disposal of used oil and household hazardous wastes; and (c) a program to promote, publicize, and facilitate the proper use, application, and disposal of pesticides, herbicides, and fertilizers.